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DE3320721A1 - METHOD FOR SECURING THE CODE OF AN ELECTRONIC KEY - Google Patents

METHOD FOR SECURING THE CODE OF AN ELECTRONIC KEY

Info

Publication number
DE3320721A1
DE3320721A1 DE19833320721 DE3320721A DE3320721A1 DE 3320721 A1 DE3320721 A1 DE 3320721A1 DE 19833320721 DE19833320721 DE 19833320721 DE 3320721 A DE3320721 A DE 3320721A DE 3320721 A1 DE3320721 A1 DE 3320721A1
Authority
DE
Germany
Prior art keywords
code
receiver
transmitter
securing
electronic key
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.)
Withdrawn
Application number
DE19833320721
Other languages
German (de)
Inventor
Friedrich Dr. 8000 München Dannhäuser
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Priority to DE19833320721 priority Critical patent/DE3320721A1/en
Priority to EP84106142A priority patent/EP0128457A3/en
Priority to JP59116328A priority patent/JPS6010081A/en
Publication of DE3320721A1 publication Critical patent/DE3320721A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00182—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional data transmission between data carrier and locks
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/20—Individual registration on entry or exit involving the use of a pass
    • G07C9/21—Individual registration on entry or exit involving the use of a pass having a variable access code
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00182—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional data transmission between data carrier and locks
    • G07C2009/00238—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional data transmission between data carrier and locks the transmittted data signal containing a code which is changed
    • G07C2009/00253—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional data transmission between data carrier and locks the transmittted data signal containing a code which is changed dynamically, e.g. variable code - rolling code
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C2009/00753—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys
    • G07C2009/00769—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means
    • G07C2009/00785—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means by light

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Lock And Its Accessories (AREA)
  • Selective Calling Equipment (AREA)

Description

SIEMENS AKTIENGESELLSCHAFT Unser ZeichenSIEMENS AKTIENGESELLSCHAFT Our mark

Berlin und München VPA gg ρ 13 9 5 OEBerlin and Munich VPA gg ρ 13 9 5 OE

Verfahren zur Code-Sicherung bei einem elektronischen Schlüssel Procedure for securing the code in the case of an electronic key

Die Erfindung betrifft ein Verfahren zur Code-Sicherung bei einem elektronischen Schlüssel, insbesondere für Kraftfahrzeuge mit eingebauter Zentralverriegelung, der aus einem Sender besteht, welcher ein codiertes Infrarot-Signal aussendet, das von einem auf den Code abgestimmten Empfänger aufgenommen wird, wobei der Code des Signals bei Sender und Empfänger verstellbar sind, indem im Sender und im Empfänger eine Anzahl von Code-Nummern 1 bis η gespeichert sind und nach jedem Sende- und Empfangsvorgang im Sender und Empfänger eine neue übereinstimmende Code-Nummer selbsttätig eingestellt wird.The invention relates to a method for securing codes in an electronic key, in particular for Motor vehicles with built-in central locking, the consists of a transmitter that sends out a coded infrared signal that is matched to the code by a Receiver is added, whereby the code of the signal can be adjusted on the transmitter and receiver, by storing a number of code numbers 1 to η in the transmitter and in the receiver and after each transmission and receiving process in the transmitter and receiver automatically set a new matching code number will.

Ein derartiges Verfahren ist aus der älteren Patentanmeldung P 32 34 538.0 bekannt. Das bekannte Verfahren soll die Möglichkeit eines Diebstahles durch Kopieren des Codes bei der Benutzung elektronischer Schlüssel mit drahtloser Übertragung eines Codes (z.B. mit moduliertem Infrarotlicht) verhindern. Diese Gefahr wird weitgehend reduziert durch Verwendung einer Anzahl verschiedener Codes, die von Mal zu Mal geändert werden. Für eine einwandfreie Benutzung ist eine synchrone Auswahl erforderlich, d.h. Sender und Empfänger müssen jeweils auf den gleichen Code eingestellt sein.Such a method is known from the earlier patent application P 32 34 538.0. The known procedure is intended to reduce the possibility of theft by copying the code when using electronic keys prevent wireless transmission of a code (e.g. with modulated infrared light). This danger is largely reduced by using a number of different codes which are changed from time to time. Synchronous selection is required for proper use, i.e. the transmitter and receiver must each set to the same code.

Wenn nun versehentlich ein oder mehrere Sendevorgänge außerhalb des Empfangsbereiches des Empfängers erfolgen, sind Sender und Empfänger auf verschiedeneIf one or more sending processes are accidentally carried out outside the receiving range of the recipient, are sender and receiver on different

Sac 1 Gae / 08.06.1983Sac 1 Gae / 06/08/1983

- ζ - VPA 83 P 1 3 9 5 DE- ζ - VPA 83 P 1 3 9 5 DE

Codes eingestellt, da die Code-Nummer zwar im Sender nach jedem Sendevorgang weitergeschaltet wird, der Empfänger jedoch, weil er kein Signal empfangen hat, auf der dem zuletzt empfangenen Signal entsprechenden Code-Nummer stehengeblieben ist. Es tritt also der Fall ein, daß sich das Kraftfahrzeug nicht mehr aufschließen läßt.Codes set because the code number is in the transmitter is switched on after each transmission process, but the receiver, because it has not received a signal, on the code number corresponding to the last signal received has remained. So the case occurs one that the motor vehicle no longer unlocks leaves.

In der älteren Patentanmeldung ist nun vorgeschlagen worden, die Synchronisation entweder durch ein Quittierungssignal vom Empfänger oder durch Datenaustausch über eine direkte elektrische Verbindung vorzunehmen. Die erste Lösung ist jedoch technisch aufwendig und die zweite nicht immer durchführbar oder erwünscht.It is now proposed in the earlier patent application synchronization either through an acknowledgment signal from the receiver or through data exchange via a direct electrical connection. The first solution, however, is technical expensive and the second not always feasible or desirable.

Aufgabe der vorliegenden Erfindung ist es daher, das eingangs genannte Verfahren derart weiterzubilden, daß auch bei nichtvorhandener Synchronisation zwischen Sender und Empfänger wieder eine Synchronisation in einfacher Weise hergestellt werden kann.The object of the present invention is therefore to develop the method mentioned at the beginning in such a way that synchronization in. even if there is no synchronization between transmitter and receiver can be produced in a simple manner.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der vom Sender ausgesandte Code eine Information für den Empfänger enthält, welche Code.-Nummer als nächste aus dem gespeicherten Vorrat auszuwählen ist.According to the invention, this object is achieved in that the code sent by the transmitter provides information for the Recipient contains which code number is coming next is to be selected from the stored supply.

Damit wird der Vorteil erzielt, daß auch in dem Fall, in dem Sender und Empfänger auf verschiedene Codes eingestellt sind und der erste Öffnungsversuch daher erfolglos bleiben wird, der Empfänger die Information zur Auswahl des folgenden Codes übernimmt, so daß beim folgenden Tastendruck des Senders das System synchron arbeitetThis has the advantage that even in the case where the transmitter and receiver are set to different codes and the first attempt at opening will therefore be unsuccessful, the recipient will be given the information to choose from of the following code, so that the system works synchronously the next time the transmitter button is pressed

und das Schloß geöffnet wird.and the lock is opened.

Eine vorteilhafte Ausgestaltung des erfindungsgemäßen Verfahrens besteht darin, daß der Empfänger eine Nachsynchronisierung nur in Richtung zu höheren Code-Nummern annimmt. Weiterhin ist es vorteilhaft, wenn der Empfänger eine Nachsynchronisierung nur in einem engen Intervall von Code-Nummern annimmt.An advantageous embodiment of the invention The method consists in the fact that the receiver carries out a re-synchronization only towards higher code numbers. It is also advantageous if the Receiver only accepts re-synchronization within a narrow range of code numbers.

Durch die erfindungsgemäße Weiterbildung wird das Sicherheitsrisiko wesentlich eingeschränkt, da die aus beiden Codes gebildete Folge bei unbefugter Wiederholung zum Öffnen des Schlosses führen könnte. Dadurch, daß der Empfänger eine Nachsynchronisierung nur zu höheren Nummern in seiner Code-Liste bzw. nur in einemengen Intervall von Code-Nummern akzeptiert, ist eine einmal abgehörte Code-Folge sofort wirkungslos und kann erst nach längerer, dem unbefugten Benutzer unbekannter Zeit einigemale wirkungsvoll werden.The further development according to the invention significantly limits the security risk, since the sequence formed by both codes could lead to the opening of the lock in the event of unauthorized repetition. Through this, that the receiver can only re-sync to higher numbers in its code list or only to a few Interval of code numbers is accepted, a code sequence that has been listened to has no effect immediately and can only become effective a few times after a long period of time unknown to the unauthorized user.

Das erfindungsgemäße Verfahren gestattet somit in besonders einfacher Weise eine Synchronisation zwischen Sender und Empfänger, wenn durch versehentlich ausgelöste Sendesignale zunächst eine Asynchronität zwischen Sender und Empfänger vorhanden ist.The method according to the invention thus allows synchronization between Transmitter and receiver, if there is initially an asynchronicity between the transmission signals triggered by mistake Transmitter and receiver is present.

3 Patentansprüche3 claims

Claims (3)

PatentansprücheClaims Verfahren zur Code-Sicherung bei einem elektronischen Schlüssel, insbesondere für Kraftfahrzeuge, mit eingebauter Zentralverriegelung, der aus einem Sender besteht, welcher ein codiertes Infrarot-Signal aussendet, das von einem auf den Code abgestimmten Empfänger aufgenommen wird, wobei der Code des Signals bei Sender und Empfänger verstellbar sind, in dem im Sender und im Empfänger eine Anzahl von Code-Nummern 1 bis η gespeichert sind und nach jedem Sende- und Empfangsvorgang im Sender und Empfänger eine neue übereinstimmende Code-Nummer selbsttätig eingestellt wird, d a durch gekennzeichnet, daß der vom Sender ausgesandte Code eine Information für den Empfänger enthält, welche Code-Nummer als nächste aus dem gespeicherten Vorrat auszuwählen ist.Method for securing codes in the case of an electronic key, in particular for motor vehicles, with built-in central locking, which consists of a transmitter that sends a coded infrared signal emits, which is picked up by a receiver tuned to the code, the code of the signal in the transmitter and receiver are adjustable, in which a number of code numbers in the transmitter and in the receiver 1 to η are stored and after each transmission and reception process in the transmitter and receiver a new matching one Code number is set automatically, d a characterized by the fact that the from Transmitter sent code contains information for the receiver which code number is next from is to be selected from the stored supply. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Empfänger eine Nachsynchronisierung nur in Richtung zu höheren Code-Nummern annimmt.2. The method according to claim 1, characterized in that that the receiver does a resynchronization only in the direction of higher code numbers accepts. 3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Empfänger eine Nachsynchronisierung nur in einem engen Intervall von Code-Nummern annimmt.3. The method according to claim 1 or 2, characterized characterized in that the receiver does a resynchronization only in a narrow interval of Accepts code numbers.
DE19833320721 1983-06-08 1983-06-08 METHOD FOR SECURING THE CODE OF AN ELECTRONIC KEY Withdrawn DE3320721A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE19833320721 DE3320721A1 (en) 1983-06-08 1983-06-08 METHOD FOR SECURING THE CODE OF AN ELECTRONIC KEY
EP84106142A EP0128457A3 (en) 1983-06-08 1984-05-29 Coding method for an electronic key
JP59116328A JPS6010081A (en) 1983-06-08 1984-06-06 Electronic key code security method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19833320721 DE3320721A1 (en) 1983-06-08 1983-06-08 METHOD FOR SECURING THE CODE OF AN ELECTRONIC KEY

Publications (1)

Publication Number Publication Date
DE3320721A1 true DE3320721A1 (en) 1984-12-13

Family

ID=6200962

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19833320721 Withdrawn DE3320721A1 (en) 1983-06-08 1983-06-08 METHOD FOR SECURING THE CODE OF AN ELECTRONIC KEY

Country Status (3)

Country Link
EP (1) EP0128457A3 (en)
JP (1) JPS6010081A (en)
DE (1) DE3320721A1 (en)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3520397A1 (en) * 1985-06-07 1986-12-11 Audi AG, 8070 Ingolstadt CODING METHOD
DE3624707A1 (en) * 1985-07-22 1987-01-22 Aisin Seiki LOCK CONTROL DEVICE FOR VEHICLES
DE3636822C1 (en) * 1986-10-29 1987-10-15 Ruf Kg Wilhelm Electronic remote actuation device, in particular for central locking systems of motor vehicles
FR2616252A1 (en) * 1987-06-04 1988-12-09 Lot Gerard Method and installation for monitoring movements in a protected area
DE3840857A1 (en) * 1988-12-03 1990-06-07 Hella Kg Hueck & Co Device for the remote control of security devices
DE4221142A1 (en) * 1992-06-27 1994-01-13 Kiekert Gmbh Co Kg Central locking system for vehicle with remote operation - has coder and decoder operative at two ranges of frequency to cover radio transmission and light transmission
US6108326A (en) * 1997-05-08 2000-08-22 Microchip Technology Incorporated Microchips and remote control devices comprising same
US6166650A (en) * 1991-05-29 2000-12-26 Microchip Technology, Inc. Secure self learning system
US6690796B1 (en) 1995-05-17 2004-02-10 The Chamberlain Group, Inc. Rolling code security system
US7492898B2 (en) 1995-05-17 2009-02-17 The Chamberlain Group, Inc. Rolling code security system
US8194856B2 (en) 1995-05-17 2012-06-05 The Chamberlain Group, Inc. Rolling code security system
US10652743B2 (en) 2017-12-21 2020-05-12 The Chamberlain Group, Inc. Security system for a moveable barrier operator
US10862924B2 (en) 2005-06-30 2020-12-08 The Chamberlain Group, Inc. Method and apparatus to facilitate message transmission and reception using different transmission characteristics
US10944559B2 (en) 2005-01-27 2021-03-09 The Chamberlain Group, Inc. Transmission of data including conversion of ternary data to binary data
US10997810B2 (en) 2019-05-16 2021-05-04 The Chamberlain Group, Inc. In-vehicle transmitter training
US11074773B1 (en) 2018-06-27 2021-07-27 The Chamberlain Group, Inc. Network-based control of movable barrier operators for autonomous vehicles
US11423717B2 (en) 2018-08-01 2022-08-23 The Chamberlain Group Llc Movable barrier operator and transmitter pairing over a network
US12149618B2 (en) 2005-01-27 2024-11-19 The Chamberlain Group Llc Method and apparatus to facilitate transmission of an encrypted rolling code

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3536378A1 (en) * 1985-10-11 1987-04-16 Bayerische Motoren Werke Ag SAFETY DEVICE FOR A MOTOR VEHICLE
US4854143A (en) * 1987-08-07 1989-08-08 Intelock Corporation Bolt assembly and method
JP3319230B2 (en) * 1994-08-05 2002-08-26 株式会社デンソー Remote control device
US10981395B2 (en) * 2017-09-26 2021-04-20 Sato Holdings Kabushiki Kaisha Printer

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1595797A (en) * 1978-04-21 1981-08-19 Pushman Hugh John Security systems
DE3237622A1 (en) * 1982-10-11 1984-04-12 Bayerische Motoren Werke AG, 8000 München SECURITY DEVICE

Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3520397A1 (en) * 1985-06-07 1986-12-11 Audi AG, 8070 Ingolstadt CODING METHOD
DE3624707A1 (en) * 1985-07-22 1987-01-22 Aisin Seiki LOCK CONTROL DEVICE FOR VEHICLES
US4926332A (en) * 1985-07-22 1990-05-15 Aisin Seiki Kabushiki Kaisha Locking device for vehicles
DE3636822C1 (en) * 1986-10-29 1987-10-15 Ruf Kg Wilhelm Electronic remote actuation device, in particular for central locking systems of motor vehicles
US4847614A (en) * 1986-10-29 1989-07-11 Wilhelm Ruf Kg Electronic remote control means, especially for centrally controlled locking systems in motor vehicles
FR2616252A1 (en) * 1987-06-04 1988-12-09 Lot Gerard Method and installation for monitoring movements in a protected area
DE3840857A1 (en) * 1988-12-03 1990-06-07 Hella Kg Hueck & Co Device for the remote control of security devices
US6166650A (en) * 1991-05-29 2000-12-26 Microchip Technology, Inc. Secure self learning system
DE4221142A1 (en) * 1992-06-27 1994-01-13 Kiekert Gmbh Co Kg Central locking system for vehicle with remote operation - has coder and decoder operative at two ranges of frequency to cover radio transmission and light transmission
US5477214A (en) * 1992-06-27 1995-12-19 Kiekert Gmbh & Co. Kg Central lock system for automotive vehicle
DE4221142C2 (en) * 1992-06-27 1998-02-19 Kiekert Ag Central locking system for a motor vehicle
US8233625B2 (en) 1995-05-17 2012-07-31 The Chamberlain Group, Inc. Rolling code security system
US8284021B2 (en) 1995-05-17 2012-10-09 The Chamberlain Group, Inc. Rolling code security system
US8633797B2 (en) 1995-05-17 2014-01-21 The Chamberlain Group, Inc. Rolling code security system
US7412056B2 (en) 1995-05-17 2008-08-12 The Chamberlain Group, Inc. Rolling code security system
US7492898B2 (en) 1995-05-17 2009-02-17 The Chamberlain Group, Inc. Rolling code security system
US7623663B2 (en) 1995-05-17 2009-11-24 The Chamberlain Group, Inc. Rolling code security system
US8194856B2 (en) 1995-05-17 2012-06-05 The Chamberlain Group, Inc. Rolling code security system
US6690796B1 (en) 1995-05-17 2004-02-10 The Chamberlain Group, Inc. Rolling code security system
US6108326A (en) * 1997-05-08 2000-08-22 Microchip Technology Incorporated Microchips and remote control devices comprising same
US6985472B2 (en) 1997-05-08 2006-01-10 Microchip Technology Incorporated Method of communication using an encoder microchip and a decoder microchip
US12149618B2 (en) 2005-01-27 2024-11-19 The Chamberlain Group Llc Method and apparatus to facilitate transmission of an encrypted rolling code
US10944559B2 (en) 2005-01-27 2021-03-09 The Chamberlain Group, Inc. Transmission of data including conversion of ternary data to binary data
US11799648B2 (en) 2005-01-27 2023-10-24 The Chamberlain Group Llc Method and apparatus to facilitate transmission of an encrypted rolling code
US10862924B2 (en) 2005-06-30 2020-12-08 The Chamberlain Group, Inc. Method and apparatus to facilitate message transmission and reception using different transmission characteristics
US11778464B2 (en) 2017-12-21 2023-10-03 The Chamberlain Group Llc Security system for a moveable barrier operator
US11122430B2 (en) 2017-12-21 2021-09-14 The Chamberlain Group, Inc. Security system for a moveable barrier operator
US12108248B2 (en) 2017-12-21 2024-10-01 The Chamberlain Group Llc Security system for a moveable barrier operator
US10652743B2 (en) 2017-12-21 2020-05-12 The Chamberlain Group, Inc. Security system for a moveable barrier operator
US11763616B1 (en) 2018-06-27 2023-09-19 The Chamberlain Group Llc Network-based control of movable barrier operators for autonomous vehicles
US11074773B1 (en) 2018-06-27 2021-07-27 The Chamberlain Group, Inc. Network-based control of movable barrier operators for autonomous vehicles
US12056971B1 (en) 2018-06-27 2024-08-06 The Chamberlain Group Llc. Network-based control of movable barrier operators for autonomous vehicles
US11423717B2 (en) 2018-08-01 2022-08-23 The Chamberlain Group Llc Movable barrier operator and transmitter pairing over a network
US11869289B2 (en) 2018-08-01 2024-01-09 The Chamberlain Group Llc Movable barrier operator and transmitter pairing over a network
US12354422B2 (en) 2018-08-01 2025-07-08 The Chamberlain Group Llc Movable barrier operator and transmitter pairing over a network
US11462067B2 (en) 2019-05-16 2022-10-04 The Chamberlain Group Llc In-vehicle transmitter training
US10997810B2 (en) 2019-05-16 2021-05-04 The Chamberlain Group, Inc. In-vehicle transmitter training

Also Published As

Publication number Publication date
EP0128457A2 (en) 1984-12-19
EP0128457A3 (en) 1987-07-22
JPS6010081A (en) 1985-01-19

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