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WO1989001672A1 - Emulateur de piste magnetique de carte de mouvements - Google Patents

Emulateur de piste magnetique de carte de mouvements Download PDF

Info

Publication number
WO1989001672A1
WO1989001672A1 PCT/US1987/002036 US8702036W WO8901672A1 WO 1989001672 A1 WO1989001672 A1 WO 1989001672A1 US 8702036 W US8702036 W US 8702036W WO 8901672 A1 WO8901672 A1 WO 8901672A1
Authority
WO
WIPO (PCT)
Prior art keywords
card
magnetic
layer
stripe
data
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US1987/002036
Other languages
English (en)
Inventor
Norman S. Burkhardt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
INTELLICARD INTERNATIONAL Inc
Original Assignee
INTELLICARD INTERNATIONAL Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by INTELLICARD INTERNATIONAL Inc filed Critical INTELLICARD INTERNATIONAL Inc
Priority to PCT/US1987/002036 priority Critical patent/WO1989001672A1/fr
Publication of WO1989001672A1 publication Critical patent/WO1989001672A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
    • G06K7/10316—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers
    • G06K7/10336—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers the antenna being of the near field type, inductive coil
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/06187—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with magnetically detectable marking
    • G06K19/06206—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with magnetically detectable marking the magnetic marking being emulated
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/08—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes
    • G06K7/082—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors
    • G06K7/083—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors inductive
    • G06K7/084—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors inductive sensing magnetic material by relative movement detecting flux changes without altering its magnetised state

Definitions

  • the present invention pertains generally to magnetic recording and more specifically to a device for emulating a prerecorded magnetic stripe on a transaction card.
  • variable information i.e., information which may change with each use of the card. For example, it may be desirable to transmit information, such as a verification number, which changes with each use of the card. Additionally, it may also be desirable to transfer other variable information from the transaction card to the card reader such as the amount of the transaction and other transaction information.
  • the present invention overcomes the disadvantages and limitations of the prior art by providing a magnetic field generator which is elongated to produce a magnetic field across substantially the entire length of a conventional prerecorded magnetic stripe.
  • the microprocessor of the present invention sequentially applies the data to the magnetic field generator so that the magnetic field for each data bit is sequentially produced along the entire length of the magnetic recording stripe.
  • the present invention also includes a device for detecting the speed at which the card is moving through the card reader to control the rate at which data is transmitted to the magnetic field generator.
  • the present invention is therefore comprised of a device for emulating a magnetic stripe having prerecorded data disposed in a predetermined area on a transaction card to transfer data from the transaction card to a card reader comprising sequentially generating data to be read by the card reader; a magnetic field generator for sequentially generating magnetic fields across substantially the entire portion of the predetermined area in response to the data, the magnetic fields having a field strength substantially equivalent to prerecorded data on the magnetic stripe.
  • the advantages of the present invention are that specially designed card readers are not required to interact with the magnetic field generator of the present invention.
  • the present invention emulates a prerecorded magnetic stripe in both field strength and the rate at which data is read from the card.
  • the card need not be precisely located within the card reader to provide a proper connection for transferring data. Rather, the present invention can be located anywhere within the card reader and need not even be moved to transmit data at the proper rate. Additionally, the present invention is simple and easy to manufacture and does not require a complex array of magnetic field generators or complex multiplexing techniques.
  • the data is sequentially fed to the elongated magnetic field generator which sequentially generates data bits across the entire length of the magnetic stripe to allow detection at any location of the read head of the card reader on the magnetic stripe independently of the speed of movement of the card through the card reader.
  • Figure 1 is a schematic view of the backside of a conventional credit card.
  • Figure 2 is a schematic plan view illustrating an initial structure of the first embodiment of the present invention.
  • Figure 3 is a schematic plan view of a subsequent structure of the first embodiment of the present invention.
  • Figure 4 schematically illustrates still another subsequent structure of the first embodiment of the present invention.
  • Figure 5 is a cross-sectional view of Figure 4.
  • Figure 6 is a cross-sectional view of Figure 4.
  • Figure 7 is a schematic view illustrating the manner in which multiple magnetic field generators can be used to emulate multiple prerecorded magnetic stripes.
  • Figure 8 is a plan view of an alternative embodiment of the present invention.
  • Figure 9 is a schematic plan view of an initial structure of the embodiment illustrated in Figure 8.
  • Figure 10 is a subsequent structure of the embodiment illustrated in Figure 8.
  • Figure 11 is still another subsequent structure of the embodiment illustrated in Figure 8.
  • Figure 12 is a cross-sectional view of the structure illustrated in Figure 8.
  • Figure 13 is a schematic diagram of the device of the present invention for detecting the speed of movement of the card through the card reader and the quadrature driving circuit for applying electrical current to the magnetic field generators.
  • Figure 1 is a schematic view of the back side of a credit card 10 illustrating a magnetic stripe area 12 which normally contains four separate magnetic stripes containing prerecorded information, such as account number and other identifying information pertaining to the transaction card 10.
  • the present invention uses magnetic field generators which extend along substantially the entire length of the magnetic stripe 12 so that each data bit is sequentially generated along the entire length of the magnetic stripe 12.
  • transaction card 10 includes a signature line 14, an embossed account number 16 and an embossed expiration date 18.
  • edge connectors 20, 22 are provided along the edge of the credit card 10 to provide power contacts for providing supplemental power which can be applied to the internal power supply of the card 10 and/or quadrature driving circuits.
  • FIG. 2 is a schematic block diagram illustrating the manner in which the first two layers of the first embodiment of the present invention are fabricated.
  • a flexible plastic substrate which is essentially ⁇ onconductive and nonpermeable, is used as a base layer of the structure.
  • the substrate must have sufficient flexibility and adhesive properties to allow the structure of the present invention to be attached to the substrate.
  • Various techniques of applying the various layers of the present invention can include sputtering, electro-less plating and electro-plating.
  • Various etching processes can also be used including photo etching and various masking techniques.
  • a copper layer 26 is applied to flexible substrate 24 across the entire surface of the structure.
  • the copper film 26 is then etched to reveal a series of bottom traces 28 formed from the copper layer 26.
  • the bottom trace 30 is connected directly to the copper layer 26 and can be etched specifically to provide a conductive path to components mounted on the copper layer plane 26.
  • the copper layer 26 is in the range of 0.001 to 0.003 inches thick.
  • Figure 3 illustrates the next step in the process of fabricating the first embodiment of the present invention.
  • a highly permeable, nonconductive layer is applied over the copper layer so that it substantially covers the entire structure.
  • a photoresistive layer is then applied to the highly permeable, nonconductive layer and exposed in a predetermined design.
  • the highly permeable, nonconductive layer is then etched to reveal pole portions 32, 34 and loop portion 36 which form a magnetic circuit.
  • Pole portions 32, 34 have a width of approximately 0.003 to 0.005 inches with a gap spacing between the pole pieces of approximately 0.010 inches.
  • the photo etching process is capable of providing the necessary tolerances to produce the desired dimensions.
  • the loop portion 36 covers a portion of the bottom copper traces 28, 30.
  • the highly permeable, nonconductive layer can comprise materials such as CoZr or Ni-Fe.
  • Various deposition processes may be used to apply the highly permeable magnetic layer including sputtering or electro-less plating.
  • Figure 4 discloses the next step in the process of fabricating the first embodiment of the present invention.
  • a diamagnetic material 40 having a high conductive value is placed in the gap between the pole pieces 32, 34.
  • the diamagnetic material functions to impede magnetic field lines directly between pole pieces 32 and 34 so as to redirect the flux lines vertically around the diamagnetic material 40 disposed between pole pieces 32, 34.
  • the diamagnetic material can comprise gold which has a very high conductive value or any desired material having conductive values sufficient to impede magnetic field lines from coupling between pole pieces 32, 34.
  • the diamagnetic material can be applied by various techniques including masking and painting, pressing of the material into the gap between pole pieces 32 and 34.
  • the diamagnetic material is in continuous electrical contact with the copper plane 26 for the entire length of the magnetic pole pieces 32, 34. The electrical contact is of low resistance and without break or interruption. Fabrication of the device may slow that copper can be used instead of gold for the diamagnetic break.
  • a second copper layer is applied in the area 42 which was previously etched from the first copper layer.
  • the second copper layer has a thickness of approximately 0.004 to 0.008 inches thick.
  • the second copper layer is then coated with a photoresistive material, exposed in accordance with the desired design and etched to reveal a series of upper traces 44 which are alternatively connected to the ends of lower traces 28, 30 to form a spiral coil around leg portion 46 of loop 36.
  • Application of electrical current to coil 48 induces a magnetic flux in loop 36 and pole portions 32, 34 to cause magnetic field lines to pass over the diamagnetic material between pole pieces 32 and 34.
  • a filler material 50 is then placed adjacent the highly permeable nonconductive material to form an essentially smooth and flat surface.
  • FIG. 5 is a cross-sectional view of Figure 4 illustrating the various components associated with coil 48 and flake portion 46 of magnetic loop 36.
  • flexible substrate 24 has a copper layer 26 disposed on its upper surface from which the bottom traces 28 and 30 are etched.
  • a nonconductive permeable layer 46 is then disposed over the bottom traces and in the interstitial portions between the bottom traces to a predetermined height, as illustrated in Figure 5.
  • Upper traces 44 are then disposed over the highly permeable nonconductive layer of 46 and etched to form the top traces 44.
  • a nonconductive nonpermeable filler layer 50 is then applied to the structure to fill the interstitial portions between upper traces 44 and form a flat surface onto which a top layer 50 is disposed for protective purposes.
  • Figure 6 is a cross-sectional view of the pole portions of Figure 4.
  • a flexible substrate 24 has a copper base plane 46 disposed on its upper surface,. as described above.
  • the highly permeable nonconductive pole pieces 32, 34 are then disposed on the top surface of the conductive base plane 46.
  • the diamagnetic material 40 is disposed between pole pieces 32, 34 to form a substantially level layer.
  • Filler 50 is then disposed on the exterior surfaces of pole pieces 32, 34 to form a substantially flat layer onto which a protective cover layer 54 is disposed.
  • Cover layer 54 provides protection and prevents wear of the magnetic pole portions 32, 34.
  • the top protective layer 54 is approximately 0.001 inches thick.
  • Figure 7 is a schematic plan view illustrating the manner in which four magnetic field generators 56, 58, 60, 62 may be disposed on the card to form four separate magnetic stripes which emulate four prerecorded stripes on a conventional transaction card.
  • Each separate magnetic generator has a separate drive coil for sequentially generating magnetic data on each of the magnetic field generator.
  • Figure 8 is a schematic plan view of the manner in which an alternative magnetic field generator 64 is disposed in the magnetic stripe area 66 of a standard credit card 68.
  • the magnetic field generator 64 illustrated in Figure 8, comprises a.three dimensional structure having pole pieces 70, 72 which are separated by a diamagnetic material 74. Spiral coil 76 is wrapped around the magnetic stand portion which is coupled to magnetic pole portion 72, as disclosed above.
  • Figure 9 is a schematic plan view illustrating the initial steps of forming the magnetic field generator structure 64 of the second embodiment of the present invention.
  • a flexible nonconductive nonpermeable substrate 78 is provided which can form one of the plastic laminate layers of the transaction card of the present invention.
  • a layer of highly permeable material is then applied to the substrate 78 and etched to form a magnetic bottom pole piece 80. Alternatively, the permeable metal can be applied by masking techniques to form the bottom pole piece 80 in the desired configuration.
  • a filler layer 82 of nonconductive, nonpermeable material is then applied over the bottom pole piece 80 and plastic substrate 78 to form a substantially flat surface.
  • a layer of copper or other conductive material is then applied over the filler layer 82 and etched to form a spiral coil 76 and back plane 84. Again, these layers can be applied by any desired process including the use of sputtering, masking techniques, lamination techniques, electro-less and electro-plating, etc.
  • Figure 10 illustrates the next step in forming the magnetic field generator 64 of the second embodiment of the present invention.
  • a second filler layer 86 is applied over the back plane 84, conductive coil 76 and first filler layer 82.
  • the filler layer 84 is then etched to form wells 88, 90 which are aligned directly over the end portions of bottom pole piece 80.
  • a highly permeable material is then placed in wells 88, 90 to form a magnetically conductive stand portions 92, 94, respectively.
  • a magnetic material can comprise a nickel iron material which is powdered and set in a binder which is chemically cured or heat set. Alternatively, any other desired means of filling wells 88, 90 can be used to form the magnetic stands 92, 94.
  • the magnetic stand 92, 94 must necessarily have magnetic continuity with bottom pole piece 80.
  • Figure 11 illustrates the next step in forming the magnetic field generator 64 of the second embodiment of the present invention.
  • a permeable material is applied over the second filler layer 86 and etched to reveal top pole pieces 70, 72.
  • the gap 96 between pole pieces 70, 72 is then etched down to the copper plane 84 through filler layer 86.
  • the well formed by etching the gap portion 96 and filler layer 86 is then filled with a conductive material 98 to form diamagnetic break 74 between pole pieces 70 and 72.
  • the material forming the magnetic break 74 is in continuous electrical contact with the copper back plane 84.
  • the electrical contact is low in resistance and without break or interruption.
  • a final top protective layer is then applied over the entire structure.
  • Figure 12 is a cross-sectional view of the device as illustrated in Figure 8.
  • Figure 12 illustrates the flexible substrate 78, bottom pole piece 80 deposited on the upper surface of flexible substrate 78, filler layer 82 which is applied over the bottom pole piece 80 and flexible substrate 78, the conductive coil 76 and diamagnetic break plane 84 deposited on the upper surface of first filler layer 82, second filler layer 86, magnetic pole stands 92, 94 which are magnetically coupled to bottom - pole piece 80, upper pole pieces 70, 72, diamagnetic break 74 and top protective layer 100.
  • diamagnetic break 74 prevents the direct passage of magnetic field lines from pole piece 70 to pole piece 72.
  • Magnetic field lines 102 couple pole pieces 70, 72 by protruding vertically from the card for easy coupling with a magnetic read head.
  • FIG 13 is a schematic block diagram illustrating the manner in which position and velocity of the card is detected within a card reader.
  • supplemental power may be provided to the card through edge connectors comprising part of the lamination of the present invention.
  • Power is supplied from the card reader by a point contact 104, illustrated in Figure 13.
  • the point contact provides an electrical connection to the contact stripe 106 on the edge portion of the card.
  • Contact stripe 106 has a predetermined resistance per unit length so that the position of the card relative to the point contact 104 can be detected by determining the voltage difference between node 108 and node 110.
  • Resistors 112, 114 comprise balancing resistors similar to resistors in a wheatstone bridge to accentuate the difference in the voltage level at nodes 108, 110.
  • Resistors 112, 114 are connected to the Vcc power supply of the circuitry used in the present invention. Nodes 108 and 110 are connected to the positive and negative inputs, respectively, of differential amplifier 116. Differential amplifier 116 generates a differential voltage output which is applied to a differentiator 118 to generate the time differential of the difference voltage signal produced by differential amplifier 116.
  • the difference voltage output 120 of differential amplifier 116 is proportional to the position of the contact stripe 106 relative to the power contact 104.
  • Differentiator 118 can comprise a standard RC circuit with a series coupled capacitor and parallel coupled resistor to ground.
  • the time differential output 122 of the difference voltage signal 120 is a signal which is proportional to velocity of movement of the card relative to card contact 104.
  • Analog to digital converter 124 includes an o integral multiplexer.
  • the digital signal output of the analog to digital converter 124 is applied to a parallel input/output unit 126.
  • the analog to digital converter 124 applies the digital signal, indicative of position and velocity of the card, to a parallel input/output unit 126 which controls the application of power to various contacts A through R in the quadrature driver circuit 128.
  • Microprocessor 130 receives the digitized information indicating the position and velocity of the card and determines a rate at which data is to be produced to ensure that all the data is generated and applied to the magnetic field generators within the scanning time of the card across the read head of the card reader.
  • Quadrature driving circuit 128 is driven by the various contacts A through R which are enabled by the parallel input/output unit 126. Upon application of enable current from contacts A and K, a flux pattern in a first predetermined direction will be generated on coil 130 as a result of current flowing from the voltage source Vcc 131 to ground potential 133. Upon application of enable current to connectors B and J, a reverse current is applied through coil 130 to produce a magnetic field in an opposite direction since current flows from Vcc 135 to ground potential 136. Coils 130, 132, 134, and 136 are the same coils fabrication earlier as item 76 ( Figure 10) or items 28, 48 ( Figure 4). The other quadrature driving circuits operate in essentially the same manner.
  • the four coils 130, 132, 134 and 136 are capable of transmitting data by generating magnetic fields 5 in opposite directions in response to the quadrature driving circuit and thereby simultaneously produce data on four separate magnetic field generators.
  • the present invention therefore provides magnetic field generators which are capable of emulating prerecorded magnetic data on a conventional prerecorded magnetic stripe of a transaction card without the necessity of precisely locating the card in a precise predetermined location.
  • the present invention is capable of detecting the position and speed of movement of the card through the card reader to ensure that all of the data is transferred from the microprocessor to the magnetic field generator within the scanning time of the card across the read head of the card reader.
  • Diamagnetic material is used between pole pieces to generate magnetic field lines which extend vertically from the card to thereby increase the field strength adjacent the magnetic field generator outside of the card.
  • the card of the present invention can be used with the large number of conventional card readers presently in use with only minor modification.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Toxicology (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • General Health & Medical Sciences (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Credit Cards Or The Like (AREA)

Abstract

Dispositif et procédé de transfert de données à partir d'un microprocesseur placé dans une carte de mouvements, au moyen d'un lecteur de carte, par émulation d'un piste magnétique préenregistrée sur une carte de mouvements classique, telle qu'une carte de crédit ou de débit. Des données sont produites séquentiellement par le microprocesseur (130) à l'intérieur de la carte, et appliquées à un générateur de champ magnétique (130, 132, 134, 136), produisant des champs magnétiques émulant les données préenregistrées sur une piste magnétique classique d'une carte de mouvements. Cela permet le transfert de données à partir d'un microprocesseur vers des lecteurs de cartes standards, sans qu'il faille sensiblement modifier le disposiitf lecteur de cartes. On a également prévu un circuit (106-124) destiné à détecter la position et la vitesse de mouvement de la carte, au moyen du lecteur de carte, afin d'assurer que toutes les données sont transmises à partir du microprocesseur jusqu'aux générateurs de champs magnétiques, dans le temps de balayage de la carte sur la tête de lecture du lecteur de cartes.
PCT/US1987/002036 1987-08-18 1987-08-18 Emulateur de piste magnetique de carte de mouvements Ceased WO1989001672A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US1987/002036 WO1989001672A1 (fr) 1987-08-18 1987-08-18 Emulateur de piste magnetique de carte de mouvements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1987/002036 WO1989001672A1 (fr) 1987-08-18 1987-08-18 Emulateur de piste magnetique de carte de mouvements

Publications (1)

Publication Number Publication Date
WO1989001672A1 true WO1989001672A1 (fr) 1989-02-23

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Application Number Title Priority Date Filing Date
PCT/US1987/002036 Ceased WO1989001672A1 (fr) 1987-08-18 1987-08-18 Emulateur de piste magnetique de carte de mouvements

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0373411A3 (fr) * 1988-12-12 1993-03-31 SMARTDISKETTE GmbH Elément insérable dans des disposibifs de traitement electronique de donées
FR2725057A1 (fr) * 1994-09-28 1996-03-29 Gemplus Card Int Support de memorisation de type carte magnetique
EP0757444A1 (fr) * 1995-07-31 1997-02-05 STMicroelectronics S.r.l. Commutateur à commande électrique, circuit intégré et carte électronique utilisant ce commutateur
WO2011103160A1 (fr) 2010-02-16 2011-08-25 Dynamics Inc. Systèmes et procédés pour circuits d'attaque destinés à des dispositifs de communication à piste magnétique dynamiques
US9838520B2 (en) 2011-04-22 2017-12-05 Mastercard International Incorporated Purchase Magnetic stripe attachment and application for mobile electronic devices
US10430704B2 (en) 2007-12-24 2019-10-01 Dynamics Inc. Payment cards and devices with displays, chips, RFIDs, magnetic emulators, magnetic encoders, and other components

Citations (4)

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Publication number Priority date Publication date Assignee Title
US3666925A (en) * 1970-05-21 1972-05-30 Us Army Coded tape and open contact sensing circuit
US4650981A (en) * 1984-01-26 1987-03-17 Foletta Wayne S Credit card with active electronics
US4692604A (en) * 1984-10-25 1987-09-08 American Telephone And Telegraph Company, At&T Bell Laboratories Flexible inductor
US4701601A (en) * 1985-04-26 1987-10-20 Visa International Service Association Transaction card with magnetic stripe emulator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3666925A (en) * 1970-05-21 1972-05-30 Us Army Coded tape and open contact sensing circuit
US4650981A (en) * 1984-01-26 1987-03-17 Foletta Wayne S Credit card with active electronics
US4692604A (en) * 1984-10-25 1987-09-08 American Telephone And Telegraph Company, At&T Bell Laboratories Flexible inductor
US4701601A (en) * 1985-04-26 1987-10-20 Visa International Service Association Transaction card with magnetic stripe emulator

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0373411A3 (fr) * 1988-12-12 1993-03-31 SMARTDISKETTE GmbH Elément insérable dans des disposibifs de traitement electronique de donées
FR2725057A1 (fr) * 1994-09-28 1996-03-29 Gemplus Card Int Support de memorisation de type carte magnetique
EP0757444A1 (fr) * 1995-07-31 1997-02-05 STMicroelectronics S.r.l. Commutateur à commande électrique, circuit intégré et carte électronique utilisant ce commutateur
US5854481A (en) * 1995-07-31 1998-12-29 Sgs-Thomson Microelectronics, S.R.L. Electronic cord and circuit with a switch for modifying the resonant frequency of a receiver
US11037045B2 (en) 2007-12-24 2021-06-15 Dynamics Inc. Cards and devices with magnetic emulators with zoning control and advanced interiors
US10430704B2 (en) 2007-12-24 2019-10-01 Dynamics Inc. Payment cards and devices with displays, chips, RFIDs, magnetic emulators, magnetic encoders, and other components
US10467521B2 (en) 2007-12-24 2019-11-05 Dynamics Inc. Payment cards and devices with gift card, global integration, and magnetic stripe reader communication functionality
US10579920B2 (en) 2007-12-24 2020-03-03 Dynamics Inc. Systems and methods for programmable payment cards and devices with loyalty-based payment applications
US10997489B2 (en) 2007-12-24 2021-05-04 Dynamics Inc. Cards and devices with multifunction magnetic emulators and methods for using same
US11055600B2 (en) 2007-12-24 2021-07-06 Dynamics Inc. Cards with serial magnetic emulators
US11062195B2 (en) 2007-12-24 2021-07-13 Dynamics Inc. Cards and devices with multifunction magnetic emulators and methods for using same
US11238329B2 (en) 2007-12-24 2022-02-01 Dynamics Inc. Payment cards and devices with gift card, global integration, and magnetic stripe reader communication functionality
US11494606B2 (en) 2007-12-24 2022-11-08 Dynamics Inc. Cards and devices with magnetic emulators with zoning control and advanced interiors
EP2537125A4 (fr) * 2010-02-16 2014-07-30 Dynamics Inc Systèmes et procédés pour circuits d'attaque destinés à des dispositifs de communication à piste magnétique dynamiques
AU2016259296B2 (en) * 2010-02-16 2018-06-07 Dynamics Inc. Systems and methods for drive circuits for dynamic magnetic stripe communications devices
WO2011103160A1 (fr) 2010-02-16 2011-08-25 Dynamics Inc. Systèmes et procédés pour circuits d'attaque destinés à des dispositifs de communication à piste magnétique dynamiques
US9838520B2 (en) 2011-04-22 2017-12-05 Mastercard International Incorporated Purchase Magnetic stripe attachment and application for mobile electronic devices

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