-
公开(公告)号：USD911331S1
公开(公告)日：2021-02-23
申请号：US29684253
申请日：2019-03-19
Applicant: Lexmark International, Inc.
-
公开(公告)号：USD903756S1
公开(公告)日：2020-12-01
申请号：US29672254
申请日：2018-12-04
Applicant: Lexmark International, Inc.
-
公开(公告)号：USD918294S1
公开(公告)日：2021-05-04
申请号：US29684378
申请日：2019-03-20
Applicant: Lexmark International, Inc.
-
公开(公告)号：USD901078S1
公开(公告)日：2020-11-03
申请号：US29711388
申请日：2019-10-30
Applicant: Lexmark International, Inc.
Designer： Hyeob Kim , Brant Dennis Nystrom , Thomas Eugene Pangburn , Samuel Leo Rhodus
-
Patent Agency Ranking
公开(公告)号：US11416193B2
公开(公告)日：2022-08-16
申请号：US16822365
申请日：2020-03-18
Applicant: LEXMARK INTERNATIONAL, INC.
Inventor： Scott Richard Castle , Gary Allen Denton , Robert Henry Muyskens , Samuel Leo Rhodus , Brant Dennis Nystrom , Carl Edmond Sullivan
Abstract: A physical unclonable function (“PUF”) object can be used to encode the geography or region in which device to which the PUF is attached may operate. Disclosed are two potential ways to regionalize a device using a PUF disk: placing the magnetic sensor at a different radius depending on the region or geography intended for sale; and altering the magnetic structure of the disk to magnetically encode the region into the sensor data.
-
公开(公告)号：US11290290B2
公开(公告)日：2022-03-29
申请号：US16822355
申请日：2020-03-18
Applicant: LEXMARK INTERNATIONAL, INC.
Inventor： Scott Richard Castle , Gary Allen Denton , Robert Henry Muyskens , Samuel Leo Rhodus , Brant Dennis Nystrom
Abstract: Magnetic PUFs (Physical Unclonable Function) may utilizes a single 3-axis Hall-effect sensor for enrollment. When a PUF is manufactured, a Hall-effect sensor is used to model the PUF disk and store that data where it may be accessed. This process is called “enrollment.” This invention improves upon the PUF implementation by introducing controlled variability into the enrollment, the reading of the PUF data from the Hall-effect sensors (the number and position of read sensors), the sampling method of the read sensor(s), and the processing of the PUF data.
-
公开(公告)号：US11093724B2
公开(公告)日：2021-08-17
申请号：US16811438
申请日：2020-03-06
Applicant: Lexmark International, Inc.
Inventor： Scott Richard Castle , Tristan Santos Dalay , Robert Henry Muyskens , Neilson Gutay Navarrete , Brant Dennis Nystrom , Thomas Eugene Pangburn , Samuel Leo Rhodus
Abstract: Unique physical unclonable function objects are created by molding pre-magnetized or post-magnetized particles into a resin. The particles form a unique physical “fingerprint” based on the random particle size, position, polar rotation, magnetization level, particle density, etc. This invention addresses devices for accurately measuring the physical fingerprint of a PUF, specifically including the X, Y, & Z components of the magnetic field at enough discrete points on the PUF to allow a confident recognition of the identification. A structural element to which a PUF tag is affixed is described that may be used to scan the PUF tag with a smartphone magnetometer by swiping the structural element along the side of the phone and controlling the position of the PUF tag with guides.
-
公开(公告)号：US11645484B2
公开(公告)日：2023-05-09
申请号：US16811418
申请日：2020-03-06
Applicant: Lexmark International, Inc.
Inventor： Scott Richard Castle , Robert Henry Muyskens , Brant Dennis Nystrom
CPC classification number: G06K7/1404 , G06F21/30 , G06F21/44 , G06F21/73 , H04L9/0866 , H04L9/3278 , G06K1/12 , G06K2007/10524 , H04L2209/12
Abstract: Unique physical unclonable function objects are created by molding pre-magnetized or post-magnetized particles into a resin. The particles form a unique physical “fingerprint” based on the random particle size, position, polar rotation, magnetization level, particle density, etc. This invention addresses devices for accurately measuring the physical fingerprint of a PUF, specifically including the X, Y, & Z components of the magnetic field at enough discrete points on the PUF to allow a confident recognition of the identification. A handheld wand is described for measuring the magnetic field along an arbitrary path.
-
公开(公告)号：USD903757S1
公开(公告)日：2020-12-01
申请号：US29672258
申请日：2018-12-04
Applicant: Lexmark International, Inc.
-
-
-
-
-
-
-
-
Search Results
9
records
(took 0.011 seconds)
