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WO2024110769A1 - Security document with security elements active in infrared light - Google Patents

Security document with security elements active in infrared light Download PDF

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Publication number
WO2024110769A1
WO2024110769A1 PCT/HU2023/050020 HU2023050020W WO2024110769A1 WO 2024110769 A1 WO2024110769 A1 WO 2024110769A1 HU 2023050020 W HU2023050020 W HU 2023050020W WO 2024110769 A1 WO2024110769 A1 WO 2024110769A1
Authority
WO
WIPO (PCT)
Prior art keywords
infrared light
security
security document
infrared
base plate
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/HU2023/050020
Other languages
French (fr)
Inventor
István TÓVÁRI
Szilvia MÁTÉ
Balázs MEGYERI
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.)
ANY BIZTONSAGI NYOMDA NYRT
Original Assignee
ANY BIZTONSAGI NYOMDA NYRT
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 ANY BIZTONSAGI NYOMDA NYRT filed Critical ANY BIZTONSAGI NYOMDA NYRT
Priority to DE212023000342.2U priority Critical patent/DE212023000342U1/en
Publication of WO2024110769A1 publication Critical patent/WO2024110769A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/351—Translucent or partly translucent parts, e.g. windows
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks
    • B42D25/382—Special inks absorbing or reflecting infrared light

Definitions

  • Security documents must be provided with security elements to make them di f ficult or impossible to counterfeit .
  • the point of these security elements is to make it di f ficult , i f not impossible , to create counterfeits without suitable equipment and suf ficient expertise . It is , however, advantageous i f the authenticity and/or integrity of the security elements can be easily veri fied, either by the naked eye or by means of easily accessible and applicable equipment .
  • Patent document EP3078503B1 describes a security document that contains materials in a transparent window that absorb infrared light , but are colourless to the naked eye , which, when placed as markers , help the machine processing of security documents - such as banknotes - containing the transparent window .
  • security documents - such as banknotes - containing the transparent window .
  • Such use of infrared-absorbing materials is not primarily for security purposes but to enable the use of infrared sensors in machines that handle , issue , receive and process banknotes .
  • Patent document EP1403333A1 mentions narrow band absorption pigments in printing inks for colour combinations that can be applied by of fset or intaglio techniques , resulting in a distinguishable print when photocopied or scanned in colour, but these can only be checked with complex instruments and with di f ficulty . Also , the security document revealed does not contain any digitally printed obj ects .
  • the solution according to patent document WO/2015/ 137995 uses upconverting printing inks for document protection and relates to the production of these pigments .
  • Such pigments are used in printing inks that are visible to the naked eye , so that the prints can be read by a normal code reader .
  • the security element on it can display variable information .
  • This utility model is to provide a security document which is di f ficult to counterfeit , can have variable information added to it , but is easy to veri fy its authenticity .
  • the present utility model is based on the recognition that by placing an infrared light absorbing security element under an inf rared-transparent but visible light absorbing security element of a security document , the infrared light absorbing security element will not be visible to the naked eye . While the IR transparent security element can be checked with a simple commercially available code reader, the IR absorbing security element can only be checked with a reader designed for this purpose .
  • the present invention relates to a security document having a base plate and comprising an infrared light transparent element disposed above the plane of the base plate , and which is characterised by that an infrared light absorbing element is further disposed between the plane of the base plate and the infrared light transparent element in a way that the infrared light transparent element at least partially covers the infrared light absorbing element .
  • the utility model is described in detail below, based on the attached figures , which show a preferred embodiment of the security document according to the utility model .
  • Figure 1 shows a top view of a preferred embodiment of the security document according to the utility model ;
  • Figure 2 shows a side view of a preferred embodiment of the security document according to the utility model ;
  • Figure 3 shows a side view of another preferred embodiment of the security document according to the utility model ;
  • the security document has an infrared transparent security element , which infrared transparent security element covers at least partially an infrared absorbing security element .
  • the infrared absorbing security element is barely or not at all visible to the naked eye .
  • a security element transparent to infrared light is understood to mean that the said security element is translucent to infrared light but not translucent to at least part of the visible light in the range 380-700 nm so as not to be transparent when examined with the naked eye.
  • security document is understood to mean all certificates, documents that physically exist and from the counterfeit of which counterfeiters may gain profit, for example, documents serving as proof of identity, deeds, diplomas, certified or authenticated documents, passports, birth certificates, customs documents, travel passes, concert tickets, airline tickets, banknotes, letterheads, envelopes, stamps, duty stamps, locks, etc.
  • the security document according to the utility model may be made of paper, metal, plastic, fabric or a combination of these materials.
  • an infrared light absorbing security element is understood to mean an element placed on a security document that contains a material that absorbs infrared light.
  • Infrared light is defined as light in the wavelength range between 700 nm and 1100 nm.
  • variable information is understood to mean information that can be changed for each printed copy of the security document according to the utility model, such as barcode, different identification codes, serial number, image, etc.
  • fluorescence is understood to mean the phenomenon where a fluorescent material emits light of a different wavelength when excited by light of a given wavelength, in this case infrared light when excited by visible light .
  • Figures 1 and 2 show a top view ( Figure 1 ) and side view ( Figure 2 ) of a preferred embodiment of the security document 1 of the utility model .
  • Figure 2 shows that the security document 1 comprises an infrared light absorbing element 2 on a base plate la, above which an infrared light transparent element 3 is placed .
  • the role of the infrared transparent element 3 is to hide from the human eye any possible visible parts of the infrared absorbing element 2 . Furthermore , the infrared light transparent element 3 is not visible when illuminated by infrared light and therefore does not obstruct the inspection of the infrared light absorbing element 2 underneath .
  • the infrared light transparent element 3 can be applied to a document already containing the infrared light absorbing element 2 by means of printing techniques ( e . g . of fset , screen printing, flexo technique ) or digital techniques such as laser printing .
  • the infrared light transparent element 3 can be made from, for example , inks containing perylene-type pigments .
  • the infrared light transparent element 3 can also have fluorescence properties , in which case it emits , for example , visible light in the infrared range ( 700 nm to 1100 nm wavelength) , in particular when illuminated with light of wavelengths between 450 nm and 610 nm .
  • fluorescence properties in which case it emits , for example , visible light in the infrared range ( 700 nm to 1100 nm wavelength) , in particular when illuminated with light of wavelengths between 450 nm and 610 nm .
  • such materials are certain perylene-type pigments .
  • the infrared light transparent element 3 can cover the entire surface of the base plate la of security document 1 , but can also be placed on only part of it . More than one infrared light transparent element 3 can be placed on the security document 1 . In terms of positioning, it is essential that the infrared light transparent element 3 at least partially cover the infrared light absorbing element 2 so that the infrared light absorbing element 2 is not fully visible to the naked eye . This makes it di f ficult to counterfeit the infrared light absorbing element 2 because the counterfeiter is likely to copy only the visible part .
  • the infrared light transparent element 3 may be designed to represent a simple geometric shape , but it may also represent more complex shapes and concrete forms .
  • the infrared light transparent element 3 may take the form of the country ' s coat of arms or other important symbols .
  • the infrared light transparent element 3 may even be in the shape of the vehicle for which the licence is valid .
  • the infrared light transparent element 3 can be shaped in any pattern that can be displayed on the base plate la of security document 1 .
  • the role of the infrared light absorbing element 2 is to make counterfeiting more di f ficult and to ensure document identi fication .
  • the security features visible to the naked eye are easily identi fiable and, in the case of general security elements , the means to check them are freely available commercially in a large maj ority of cases .
  • an element which is not or is barely visible to the naked eye especially i f it is covered by another security element , makes it extremely di f ficult for counterfeiters to counterfeit .
  • the infrared light absorbing element 2 can be digitally applied to the base plate la .
  • the infrared light absorbing element 2 can be made of materials such as : dyes containing organo-nickel complexes or phthalocyanine derivatives .
  • the authenticity or the information content of the infrared light absorbing element 2 can be checked by means of a dedicated infrared light emitting reader .
  • a suitable device for reading out the hidden information is e . g . an infrared bar code reader for bar codes or a device containing an infrared light source and a camera for other graphic elements .
  • the 3 infrared light transparent element in the visible light range will hide the infrared light absorbing element 2 .
  • the infrared light transparent element 3 emits light in the infrared range ( infrared luminescence ) when exposed to visible light , this further increases the security level of the document .
  • the infrared light absorbing element 2 will be suitable by providing it with variable information, i . e . a unique identi bomb will be added to the surface of the base plate la during digital printing, which will distinguish the security document 1 from similar security documents .
  • the design of the infrared light absorbing element 2 can be , for example , a so-called QR code ( short for "Quick Response" , a two-dimensional code ) or a barcode type .
  • QR code short for "Quick Response” , a two-dimensional code
  • barcode type a barcode type .
  • the idea is that the infrared light absorbing element 2 , digitally recorded on the base plate la, contain information that can be read by a reader designed for this purpose .
  • the possibility of the infrared light absorbing element 2 appearing as a simple identi fier is not excluded . In this case , it could be a simple sequence of numbers , the value of which is varied and placed on the base plate la of each 1 security document .
  • the base plate la is the body of the security document 1 itself, on which the information and the various security elements are placed.
  • the different security features are not only the security features as defined in this model, but also some additional known security elements, e.g. metal strip, hologram, UV fluorescent elements, paper security additives, where appropriate. They are paper or plastic based and typically rectangular in shape with a thickness that is small in relation to their length and width.
  • security documents 1 consisting of several sheets, the sheets are understood as separate base plates la, at least one of which contains the above mentioned infrared light transparent element 3 and the infrared light absorbing element 2.

Landscapes

  • Optical Filters (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Credit Cards Or The Like (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)

Abstract

A security document (1) having a base plate (1a) and comprising an infrared light transparent element (3) disposed in the plane of the base plate (1a) or above the plane of the base plate (1a), wherein an infrared light absorbing element (2) is further placed between the plane of the base plate (1a) and the infrared light transparent element (3), in such a way that the infrared light transparent element (3) at least partially covers the infrared light absorbing element (2), and additionally that the infrared light transparent element (3) absorbs the visible light of wavelengths of 380-700 nm. The infrared light transparent element can comprise a perylene type pigment. The infrared light absorbing element can comprise an organo-nickel complex or a phthalocyanine derivative and be a QR code or barcode.

Description

Security document with security elements active in infrared light
The obj ect of the present utility model relatesto security documents with an infrared active security element and an infrared transparent security element .
Security documents must be provided with security elements to make them di f ficult or impossible to counterfeit . The point of these security elements is to make it di f ficult , i f not impossible , to create counterfeits without suitable equipment and suf ficient expertise . It is , however, advantageous i f the authenticity and/or integrity of the security elements can be easily veri fied, either by the naked eye or by means of easily accessible and applicable equipment .
Patent document EP3078503B1 describes a security document that contains materials in a transparent window that absorb infrared light , but are colourless to the naked eye , which, when placed as markers , help the machine processing of security documents - such as banknotes - containing the transparent window . Such use of infrared-absorbing materials is not primarily for security purposes but to enable the use of infrared sensors in machines that handle , issue , receive and process banknotes .
Patent document EP1403333A1 mentions narrow band absorption pigments in printing inks for colour combinations that can be applied by of fset or intaglio techniques , resulting in a distinguishable print when photocopied or scanned in colour, but these can only be checked with complex instruments and with di f ficulty . Also , the security document revealed does not contain any digitally printed obj ects .
At the same time , the solutions mentioned in the document do not allow for the inclusion of variable information .
The solution according to patent document WO/2015/ 137995 uses upconverting printing inks for document protection and relates to the production of these pigments . Such pigments are used in printing inks that are visible to the naked eye , so that the prints can be read by a normal code reader .
Consequently, a security document is needed whose authenticity can be easily veri fied but which is di f ficult to copy . In addition, the security element on it can display variable information .
The purpose of this utility model is to provide a security document which is di f ficult to counterfeit , can have variable information added to it , but is easy to veri fy its authenticity .
The present utility model is based on the recognition that by placing an infrared light absorbing security element under an inf rared-transparent but visible light absorbing security element of a security document , the infrared light absorbing security element will not be visible to the naked eye . While the IR transparent security element can be checked with a simple commercially available code reader, the IR absorbing security element can only be checked with a reader designed for this purpose .
In accordance with the above , the present invention relates to a security document having a base plate and comprising an infrared light transparent element disposed above the plane of the base plate , and which is characterised by that an infrared light absorbing element is further disposed between the plane of the base plate and the infrared light transparent element in a way that the infrared light transparent element at least partially covers the infrared light absorbing element .
Some preferred embodiments of the utility model are determined in the dependent claims .
The utility model is described in detail below, based on the attached figures , which show a preferred embodiment of the security document according to the utility model .
In the figures
Figure 1 shows a top view of a preferred embodiment of the security document according to the utility model ;
Figure 2 shows a side view of a preferred embodiment of the security document according to the utility model ;
Figure 3 shows a side view of another preferred embodiment of the security document according to the utility model ;
Detailed description of the utility model
The essence of the security document according to the utility model is that the security document has an infrared transparent security element , which infrared transparent security element covers at least partially an infrared absorbing security element . Thus the infrared absorbing security element is barely or not at all visible to the naked eye . In the context of the present utility model a security element transparent to infrared light is understood to mean that the said security element is translucent to infrared light but not translucent to at least part of the visible light in the range 380-700 nm so as not to be transparent when examined with the naked eye.
In the context of the present utility model security document is understood to mean all certificates, documents that physically exist and from the counterfeit of which counterfeiters may gain profit, for example, documents serving as proof of identity, deeds, diplomas, certified or authenticated documents, passports, birth certificates, customs documents, travel passes, concert tickets, airline tickets, banknotes, letterheads, envelopes, stamps, duty stamps, locks, etc. The security document according to the utility model may be made of paper, metal, plastic, fabric or a combination of these materials.
In the context of the present utility model an infrared light absorbing security element is understood to mean an element placed on a security document that contains a material that absorbs infrared light. Infrared light is defined as light in the wavelength range between 700 nm and 1100 nm.
In the context of the present utility model variable information is understood to mean information that can be changed for each printed copy of the security document according to the utility model, such as barcode, different identification codes, serial number, image, etc.
In the context of the present utility model fluorescence is understood to mean the phenomenon where a fluorescent material emits light of a different wavelength when excited by light of a given wavelength, in this case infrared light when excited by visible light .
Figures 1 and 2 show a top view ( Figure 1 ) and side view ( Figure 2 ) of a preferred embodiment of the security document 1 of the utility model . Figure 2 shows that the security document 1 comprises an infrared light absorbing element 2 on a base plate la, above which an infrared light transparent element 3 is placed .
The role of the infrared transparent element 3 is to hide from the human eye any possible visible parts of the infrared absorbing element 2 . Furthermore , the infrared light transparent element 3 is not visible when illuminated by infrared light and therefore does not obstruct the inspection of the infrared light absorbing element 2 underneath . The infrared light transparent element 3 can be applied to a document already containing the infrared light absorbing element 2 by means of printing techniques ( e . g . of fset , screen printing, flexo technique ) or digital techniques such as laser printing . The infrared light transparent element 3 can be made from, for example , inks containing perylene-type pigments . Furthermore , in order to increase security, the infrared light transparent element 3 can also have fluorescence properties , in which case it emits , for example , visible light in the infrared range ( 700 nm to 1100 nm wavelength) , in particular when illuminated with light of wavelengths between 450 nm and 610 nm . Examples of such materials are certain perylene-type pigments .
The infrared light transparent element 3 can cover the entire surface of the base plate la of security document 1 , but can also be placed on only part of it . More than one infrared light transparent element 3 can be placed on the security document 1 . In terms of positioning, it is essential that the infrared light transparent element 3 at least partially cover the infrared light absorbing element 2 so that the infrared light absorbing element 2 is not fully visible to the naked eye . This makes it di f ficult to counterfeit the infrared light absorbing element 2 because the counterfeiter is likely to copy only the visible part . In the case of a fully covered infrared light absorbing element 2 , the counterfeiter does not even detect the presence of the infrared light absorbing element 2 and is therefore not likely to copy it . The infrared light transparent element 3 may be designed to represent a simple geometric shape , but it may also represent more complex shapes and concrete forms . For example , in the case of security documents representing a particular country, such as passports , the infrared light transparent element 3 may take the form of the country ' s coat of arms or other important symbols . In the case of a driving licence , the infrared light transparent element 3 may even be in the shape of the vehicle for which the licence is valid . As can be seen from the above , the infrared light transparent element 3 can be shaped in any pattern that can be displayed on the base plate la of security document 1 .
The role of the infrared light absorbing element 2 is to make counterfeiting more di f ficult and to ensure document identi fication . The security features visible to the naked eye are easily identi fiable and, in the case of general security elements , the means to check them are freely available commercially in a large maj ority of cases . However, an element which is not or is barely visible to the naked eye , especially i f it is covered by another security element , makes it extremely di f ficult for counterfeiters to counterfeit . The infrared light absorbing element 2 can be digitally applied to the base plate la . The infrared light absorbing element 2 can be made of materials such as : dyes containing organo-nickel complexes or phthalocyanine derivatives .
When checking the infrared light absorbing element 2 , the authenticity or the information content of the infrared light absorbing element 2 can be checked by means of a dedicated infrared light emitting reader . A suitable device for reading out the hidden information is e . g . an infrared bar code reader for bar codes or a device containing an infrared light source and a camera for other graphic elements . When scanning document 1 with a non-infrared light emitting reader, the 3 infrared light transparent element in the visible light range will hide the infrared light absorbing element 2 . In addition, i f the infrared light transparent element 3 emits light in the infrared range ( infrared luminescence ) when exposed to visible light , this further increases the security level of the document . For document identi fication purposes , the infrared light absorbing element 2 will be suitable by providing it with variable information, i . e . a unique identi fier will be added to the surface of the base plate la during digital printing, which will distinguish the security document 1 from similar security documents .
The design of the infrared light absorbing element 2 can be , for example , a so-called QR code ( short for "Quick Response" , a two-dimensional code ) or a barcode type . The idea is that the infrared light absorbing element 2 , digitally recorded on the base plate la, contain information that can be read by a reader designed for this purpose . The possibility of the infrared light absorbing element 2 appearing as a simple identi fier is not excluded . In this case , it could be a simple sequence of numbers , the value of which is varied and placed on the base plate la of each 1 security document . The base plate la is the body of the security document 1 itself, on which the information and the various security elements are placed. In this context, the different security features are not only the security features as defined in this model, but also some additional known security elements, e.g. metal strip, hologram, UV fluorescent elements, paper security additives, where appropriate. They are paper or plastic based and typically rectangular in shape with a thickness that is small in relation to their length and width. For security documents 1 consisting of several sheets, the sheets are understood as separate base plates la, at least one of which contains the above mentioned infrared light transparent element 3 and the infrared light absorbing element 2.
The advantage of the solution of the utility model is that the authenticity of the document can be verified simply, but with a special tool, and some of the security features are hidden and cannot be identified by the naked eye.

Claims

Utility model claims A security document (1) having a base plate (la) and comprising an infrared light transparent element (3) disposed in the plane of the base plate (la) or above the plane of the base plate (la) , characterised by that an infrared light absorbing element (2) is further placed between the plane of the base plate (la) and the infrared light transparent element (3) , in such a way that the infrared light transparent element (3) at least partially covers the infrared light absorbing element (2) , and additionally that the infrared light transparent element (3) absorbs the visible light of wavelengths of 380-700 nm. The security document (1) according to claim 1, characterized by that the infrared transparent element (3) completely covers the infrared absorbing element (2) . A security document (1) according to any of claims 1 to 3, characterized by that the infrared transparent element (3) comprises a perylene type pigment. A security document (1) according to any of claims 1 to 4, characterized by that the infrared light absorbing element (2) comprises an organo-nickel complex or a phthalocyanine derivative . A security document (1) according to any of claims 1 to 5, characterized by that the infrared light absorbing element (2) comprises variable information. A security document (1) according to any of claims 1 to 6, characterized by that the infrared light absorbing element (2) is a QR code or barcode.
PCT/HU2023/050020 2022-11-24 2023-04-24 Security document with security elements active in infrared light Ceased WO2024110769A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE212023000342.2U DE212023000342U1 (en) 2022-11-24 2023-04-24 Security document with infrared light active security elements

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
HUU2200179 2022-11-24
HUU2200179U HU5571U (en) 2022-11-24 2022-11-24 Safety document with infrared light active safety features

Publications (1)

Publication Number Publication Date
WO2024110769A1 true WO2024110769A1 (en) 2024-05-30

Family

ID=85785911

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/HU2023/050020 Ceased WO2024110769A1 (en) 2022-11-24 2023-04-24 Security document with security elements active in infrared light

Country Status (4)

Country Link
DE (1) DE212023000342U1 (en)
HU (1) HU5571U (en)
TR (1) TR2025005744U5 (en)
WO (1) WO2024110769A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1213193A (en) * 1968-02-23 1970-11-18 Eizo Komiyama Identification card
EP1403333A1 (en) * 2002-09-24 2004-03-31 Sicpa Holding S.A. Method and ink sets for marking and authenticating articles
US20110001314A1 (en) * 2009-07-01 2011-01-06 Xerox Corporation Security codes within scratch-off layers and method of embedding thereof
WO2015068292A1 (en) * 2013-11-08 2015-05-14 共同印刷株式会社 Printed article
WO2020102181A1 (en) * 2018-11-13 2020-05-22 Ppg Industries Ohio, Inc. Method of detecting a concealed pattern

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1213193A (en) * 1968-02-23 1970-11-18 Eizo Komiyama Identification card
EP1403333A1 (en) * 2002-09-24 2004-03-31 Sicpa Holding S.A. Method and ink sets for marking and authenticating articles
US20110001314A1 (en) * 2009-07-01 2011-01-06 Xerox Corporation Security codes within scratch-off layers and method of embedding thereof
WO2015068292A1 (en) * 2013-11-08 2015-05-14 共同印刷株式会社 Printed article
WO2020102181A1 (en) * 2018-11-13 2020-05-22 Ppg Industries Ohio, Inc. Method of detecting a concealed pattern

Also Published As

Publication number Publication date
HU5571U (en) 2023-03-28
TR2025005744U5 (en) 2025-05-21
DE212023000342U1 (en) 2025-06-23

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