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公开(公告)号：US10566296B2
公开(公告)日：2020-02-18
申请号：US15809081
申请日：2017-11-10
Applicant: Lexmark International, Inc.
Inventor： Roger Steven Cannon , William Corbett , Gary A. Denton , James Paul Drummond , Kelly Ann Killeen , Carl E. Sullivan
Abstract: In the invention described, magnetic field characteristics of randomly placed magnetized particles are exploited by using the magnetic field fluctuations produced by the particles as measured by a sensor. The magnetized particles generate a complex magnetic field near the surface of an integrated circuit chip on a bank card or identification card that can be used as a “fingerprint.” The positioning and orientation of the magnetized particles is an uncontrolled process, and thus the interaction between the sensor and the particles is complex. The randomness of the magnetic field magnitude and direction near the surface of the material containing the magnetic particles can be used to obtain a unique identifier for an item such as an integrated circuit chip on a bank card or identification card carrying the PUF.
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公开(公告)号：US20180167526A1
公开(公告)日：2018-06-14
申请号：US15373967
申请日：2016-12-09
Applicant: Lexmark International, Inc.
Inventor： Roger Steven Cannon , Gary Allen Denton , Graydon Randall Dodson , Keith Bryan Hardin
CPC classification number: H04N1/00875 , B41J27/00 , G06F3/1222 , G06F3/1238 , H04N1/4426 , H04N2201/0094
Abstract: Magnetic keys having a plurality of magnetic plates are disclosed. The location and orientation of the magnetic plates are controlled to generate magnetic fields that are of sufficient strength to be reliably read and sufficient complexity to be difficult to counterfeit. The magnetic keys are located on imaging-device supply items along with non-volatile memory devices containing measurements of the magnetic fields that are digitally signed. These supply items are difficult to counterfeit. Other devices are disclosed.
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公开(公告)号：US20180165558A1
公开(公告)日：2018-06-14
申请号：US15378917
申请日：2016-12-14
Applicant: Lexmark International, Inc.
Inventor： Roger Steven Cannon , Gary Allen Denton , Graydon Randall Dodson , Keith Bryan Hardin
CPC classification number: G06K19/06187 , G06K7/087 , H04L9/00
Abstract: Magnetic keys having a plurality of magnetic layers having holes are disclosed. The location and orientation of the holes are controlled to generate magnetic fields that are of sufficient strength to be reliably read and sufficient complexity to be difficult to counterfeit. The magnetic keys are located on imaging-device supply items along with non-volatile memory devices containing measurements of the magnetic fields that are digitally signed. These supply items are difficult to counterfeit. Other devices are disclosed.
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14.发明申请公开(公告)号：US20170103834A1
公开(公告)日：2017-04-13
申请号：US14879311
申请日：2015-10-09
Applicant: Lexmark International, Inc.
Inventor： James Ronald Booth , Roger Steven Cannon , Gary Allen Denton , James Paul Drummond , Kelly Ann Killeen
CPC classification number: H01F1/22 , B22F1/0003 , B22F1/0059 , B22F2202/05 , B22F2301/15 , B22F2301/35 , B22F2301/45 , B22F2304/10 , B22F2304/15 , G06K19/06187 , G06K2019/06253 , G09C5/00 , G11C11/02 , H01F1/053 , H01F1/083 , H04L9/0866 , H04L9/3278 , Y04S40/24
Abstract: A method of making a physical unclonable function (PUF) having magnetic and non-magnetic particles is disclosed. Measuring both magnetic field and image view makes the PUF difficult to counterfeit. PUF may be incorporated into a user-replaceable supply item for an imaging device. A PUF reader may be incorporated into an imaging device to read the PUF. Other methods are disclosed.
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公开(公告)号：US20170102668A1
公开(公告)日：2017-04-13
申请号：US15192355
申请日：2016-06-24
Applicant: Lexmark International, Inc.
Inventor： Roger Steven Cannon , Gary Allen Denton , Kelly Ann Killeen , Randal Scott Williamson
IPC: G03G15/00
CPC classification number: G03G21/1676 , G09C1/00 , H04L9/3278
Abstract: A physical unclonable function (PUF) located on a supply item for an imaging device is disclosed. The PUF is advantageously located on the back side of the supply item opposite a handle. This configuration enables a PUF reader to be located at the end of the insertion path of the supply item where it is protected from damage. Other devices are disclosed.
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Patent Agency Ranking
16.发明授权公开(公告)号：US10410779B2
公开(公告)日：2019-09-10
申请号：US14879311
申请日：2015-10-09
Applicant: Lexmark International, Inc.
Inventor： James Ronald Booth , Roger Steven Cannon , Gary Allen Denton , James Paul Drummond , Kelly Ann Killeen
IPC: H01F1/22 , G09C5/00 , G06K19/06 , H01F1/053 , H01F1/08 , H04L9/32 , H04L9/08 , G11C11/02 , B22F1/00
Abstract: A method of making a physical unclonable function (PUF) having magnetic and non-magnetic particles is disclosed. Measuring both magnetic field and image view makes the PUF difficult to counterfeit. PUF may be incorporated into a user-replaceable supply item for an imaging device. A PUF reader may be incorporated into an imaging device to read the PUF. Other methods are disclosed.
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公开(公告)号：US20190157219A1
公开(公告)日：2019-05-23
申请号：US15809081
申请日：2017-11-10
Applicant: Lexmark International, Inc.
Inventor： Roger Steven Cannon , William Corbett , Gary A. Denton , James Paul Drummond , Kelly Ann Killeen , Carl E. Sullivan
IPC: H01L23/00 , H01L23/31 , H04L9/32 , H01L23/29 , H01L23/495
Abstract: In the invention described, magnetic field characteristics of randomly placed magnetized particles are exploited by using the magnetic field fluctuations produced by the particles as measured by a sensor. The magnetized particles generate a complex magnetic field near the surface of an integrated circuit chip on a bank card or identification card that can be used as a “fingerprint.” The positioning and orientation of the magnetized particles is an uncontrolled process, and thus the interaction between the sensor and the particles is complex. The randomness of the magnetic field magnitude and direction near the surface of the material containing the magnetic particles can be used to obtain a unique identifier for an item such as an integrated circuit chip on a bank card or identification card carrying the PUF.
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公开(公告)号：US09929864B2
公开(公告)日：2018-03-27
申请号：US14879323
申请日：2015-10-09
Applicant: Lexmark International, Inc.
Inventor： James Ronald Booth , Roger Steven Cannon , Gary Allen Denton , James Paul Drummond , Kelly Ann Killeen
CPC classification number: G06F17/289 , G11B5/00 , G11C7/24 , H04L9/3278
Abstract: A rotating magnetic physical unclonable function (PUF) is disclosed. Rotating the PUF enables robust low cost PUF readers. PUF may be incorporated into a user-replaceable supply item for an imaging device. A PUF reader may be incorporated into an imaging device to read the PUF. Other systems and methods are disclosed.
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公开(公告)号：US20170104600A1
公开(公告)日：2017-04-13
申请号：US14879357
申请日：2015-10-09
Applicant: Lexmark International, Inc.
Inventor： James Ronald Booth , Roger Steven Cannon , Gary Allen Denton , James Paul Drummond , Kelly Ann Killeen
CPC classification number: H04L9/3278 , G03G15/00 , G09C5/00 , H04L2209/34 , H04N1/0084 , H04N1/00856
Abstract: A physical unclonable function (PUF) imaged through two faces is disclosed. The PUF is difficult to counterfeit because the view through both faces must be duplicated for a successful counterfeit. PUF may be incorporated into a user-replaceable supply item for an imaging device. A PUF reader may be incorporated into an imaging device to read the PUF. Other systems and methods are disclosed.
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公开(公告)号：US09122189B2
公开(公告)日：2015-09-01
申请号：US14215801
申请日：2014-03-17
Applicant: Lexmark International, Inc.
Inventor： James Ronald Booth , Roger Steven Cannon , Daniel E. Pawley
CPC classification number: G03G15/04072 , G02B17/026 , G02B26/105 , H04N1/0473 , H04N1/1135 , H04N1/12 , H04N2201/0082 , H04N2201/04762
Abstract: An imaging device scan unit, including an oscillator oscillating in a predetermined oscillation pattern; a light source generating a light beam for deflection by the oscillator and including a forward sweep portion when the oscillator moves in a first direction of the oscillation pattern and a reverse sweep portion when the oscillator moves in a second direction different from the first direction thereof; and components defining at least two optical paths for the light beam, the forward sweep portion of the light beam passes through a first optical path and the reverse sweep portion of the light beam passes through a second optical path, the second optical path reverses a sweep direction of the reverse sweep portion of the light beam such that the forward sweep portion and the reverse sweep portion of the light beam are in the substantially same direction when exiting the scan unit.
Abstract translation: 一种成像设备扫描单元，包括以预定振荡模式振荡的振荡器; 当所述振荡器沿着与所述振荡图案的第一方向不同的第二方向移动时，当所述振荡器沿所述振荡图案的第一方向移动时，产生用于由所述振荡器偏转的光束的光源和包括正向扫掠部分; 以及限定用于光束的至少两个光路的部件，光束的前扫掠部分通过第一光路，并且光束的反向扫掠部分通过第二光路，第二光路反转扫描 光束的反向扫掠部分的方向，使得当离开扫描单元时，光束的正向扫掠部分和反向扫掠部分处于基本相同的方向。
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