Patents by Inventor Keith Bryan Hardin
Keith Bryan Hardin has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11951759Abstract: The invention adds a Physical Information Layer (“PIL”) to the magnetic particles within a matrix that creates an unclonable physical unclonable function “object.” The PIL assists in searching to find the combination that matches a pre-determined enrolled combination with additional information that includes a search index, which limits the range of data required to search in order to find a match in the enrolled database. The index could be a predetermined value that associates the random magnetic profile values to a list of enrolled values in a database. The additional information may include product or general information that needs to be easily communicated to a user of the PUF.Type: GrantFiled: September 2, 2022Date of Patent: April 9, 2024Assignee: LEXMARK INTERNATIONAL, INC.Inventor: Keith Bryan Hardin
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Patent number: 11686754Abstract: Described is an invention that adds capacitive sensing ability with a single magnetic field sensor location or distributed within an array of surfaces of the sensor. The capacitive sensing can be achieved by modifying a classic Hall effect sensor or putting separate capacitive sensor plates in close proximity to the hall effect sensor.Type: GrantFiled: September 2, 2021Date of Patent: June 27, 2023Assignee: Lexmark International, Inc.Inventors: James Howard Ellis, Jr., Keith Bryan Hardin
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Publication number: 20230110624Abstract: A physically unclonable function is an object that has characteristics that make it extremely difficult or impossible to copy. An array of randomly dispersed hard (magnetized) and soft (non-magnetized) magnetic particles that may be conducting or nonconducting that are disbursed in a binder create a particular magnetic field or capacitive pattern on the surface. This surface magnetic field and capacitive variations can be considered to be a unique pattern similar to fingerprint. The Hall effect prism is a sensor that measures the effects of these patterns by sensing the deformation of currents or electric potential flowing within or around a resistive substrate material that exhibits a substantial Hall effect coefficient.Type: ApplicationFiled: December 14, 2022Publication date: April 13, 2023Inventors: John Douglas Anderson, Scott Richard Castle, Keith Bryan Hardin, Robert Henry Muyskens
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Publication number: 20230114075Abstract: A physically unclonable function is an object that has characteristics that make it extremely difficult or impossible to copy. An array of randomly dispersed hard (magnetized) and soft (non-magnetized) magnetic particles that may be conducting or nonconducting that are disbursed in a binder create a particular magnetic field or capacitive pattern on the surface. This surface magnetic field and capacitive variations can be considered to be a unique pattern similar to fingerprint. The Hall effect prism is a sensor that measures the effects of these patterns by sensing the deformation of currents or electric potential flowing within or around a resistive substrate material that exhibits a substantial Hall effect coefficient.Type: ApplicationFiled: December 14, 2022Publication date: April 13, 2023Inventors: John Douglas Anderson, Scott Richard Castle, Keith Bryan Hardin, Robert Henry Muyskens
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Patent number: 11543472Abstract: A magnetic sensor array device is comprised of an array of magnetic sensors arranged on a common semiconductor substrate to measure the multi-axis magnetic field of an arbitrary sized region at high speed with high spatial resolution and high magnetic resolution. This invention further improves a multi-axis magnetic sensor array device fabricated on a common semiconductor substrate with additional optimizations to provide for variable spatial resolution, variable magnetic resolution, and a novel secret key derivation.Type: GrantFiled: September 2, 2021Date of Patent: January 3, 2023Assignee: LEXMARK INTERNATIONAL, INC.Inventors: James Howard Ellis, Jr., Keith Bryan Hardin
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Publication number: 20220410612Abstract: The invention adds a Physical Information Layer (“PIL”) to the magnetic particles within a matrix that creates an unclonable physical unclonable function “object.” The PIL assists in searching to find the combination that matches a pre-determined enrolled combination with additional information that includes a search index, which limits the range of data required to search in order to find a match in the enrolled database. The index could be a predetermined value that associates the random magnetic profile values to a list of enrolled values in a database. The additional information may include product or general information that needs to be easily communicated to a user of the PUF.Type: ApplicationFiled: September 2, 2022Publication date: December 29, 2022Inventor: Keith Bryan Hardin
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Patent number: 11522694Abstract: The present invention is a diverse acoustical object containing a range of particles that have acoustical wave impedances that are substantially different from the binder. The particles create a substantially different reflection as an acoustic wave is scattered by the particles. A negative reflection is created when the scattered wave is from a particle that has a wave impedance that is substantially less than the binder impedance. Practically, it may be necessary to encase this material in a thin material that will withstand the fabrication process (e.g., air or silicone elastomer could be encased in glass). If the wavelength is large compared to the encasing material thickness, then the reflection will be more dependent on the interior material. A mixture of materials that generate positive as well as negative reflections within the binder would add to the complexity of the PUF.Type: GrantFiled: February 24, 2021Date of Patent: December 6, 2022Assignee: Lexmark International, Inc.Inventors: Scott Richard Castle, Alexander Lloyd Chapman, Keith Bryan Hardin
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Patent number: 11442122Abstract: A magnetic sensor array device is described that is constructed with multiple single sensor die, diced out of a wafer individually and packaged in a multi-chip module (MCM). The device comprises an array of multi-axis magnetic sensors that can measure the multi-dimensional magnetic field of an arbitrary sized two-dimensional region with high spatial resolution, reduced sensing distance, higher measurement throughput, tolerance to motion, improved temperature measurement, and improved yield when placed on a circuit card comprises part of an authentication system including a physical unclonable function (“PUF”), a substrate, a plurality of magnetized particles randomly dispersed in the substrate, and a PUF reader constructed using one or more of the magnetic sensor array devices wherein the PUF reader measures the magnetic field at multiple locations in close proximity to the magnetized particles. The measured magnetic field data may be compared to previously enrolled data to assess authenticity.Type: GrantFiled: September 4, 2020Date of Patent: September 13, 2022Assignee: Lexmark International, Inc.Inventors: James Howard Ellis, Jr., Keith Bryan Hardin
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Publication number: 20220244323Abstract: A magnetic sensor device with an array of magnetic sensors arranged on a common semiconductor substrate to measure the multi-axis magnetic field of an arbitrary region with high spatial resolution, reduced sensing distance, higher measurement throughput, motion tolerance, temperature tolerance, and improved manufacturing yield. A multi-axis magnetic sensor array device fabricated on a common semiconductor substrate is optimized offering additional improvements to reduce measurement time, increase spatial resolution uniformity, and lower thermal compensation cost. Further, the central area of a surface is utilized to measure the normal magnetic field. A perimeter of Hall effect plates measuring the components of the magnetic field in the plane of the measuring surface, which allows for a very high density of normal field measurements allows calculation of the in-plane field components. Error along the edges can be mitigated with the in-plane measured components.Type: ApplicationFiled: March 5, 2021Publication date: August 4, 2022Inventors: JAMES HOWARD ELLIS, JR., KEITH BRYAN HARDIN
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Patent number: 11390005Abstract: A method for manufacturing a Z-directed component for insertion into a mounting hole in a printed circuit board according to one example embodiment includes simultaneously extruding a plurality of materials according to the structure of the Z-directed component to form an extruded object and forming the Z-directed component from the extruded object. In one embodiment, the extruded object is divided into individual Z-directed components. In one embodiment, the timing of extrusion between predetermined sections of one of the materials is varied in order to stagger the sections in the extruded object.Type: GrantFiled: November 13, 2018Date of Patent: July 19, 2022Assignee: Lexmark International, Inc.Inventors: Keith Bryan Hardin, Zachary Charles Nathan Kratzer, Qing Zhang
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Publication number: 20220176727Abstract: In the invention described, a method of creating a unique tag or labeling system for electronic printed circuit board assemblies (PCBA) that is unique, virtually un-duplicatable, and may be altered when the electronics are tampered with.Type: ApplicationFiled: December 4, 2021Publication date: June 9, 2022Inventors: JAMES HOWARD ELLIS, KEITH BRYAN HARDIN, ROBERT HENRY MUYSKENS, MITCHELL RAY ROWLETTE, CARL EDMOND SULLIVAN
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Patent number: 11346903Abstract: A magnetic sensor array device is described that is constructed with multiple single sensor die, diced out of a wafer as a group and packaged in a wafer level package (WLP). The device comprises an array of multi-axis magnetic sensors that can measure the multi-dimensional magnetic field of an arbitrary sized two-dimensional region with high spatial resolution, reduced sensing distance, higher measurement throughput, tolerance to motion, improved temperature measurement, and improved yield when placed on a circuit card comprises part of an authentication system including a physical unclonable function (“PUF”), a substrate, a plurality of magnetized particles randomly dispersed in the substrate, and a PUF reader constructed using one or more of the magnetic sensor array devices wherein the PUF reader measures the magnetic field at multiple locations in close proximity to the magnetized particles. The measured magnetic field data may be compared to previously enrolled data to assess authenticity.Type: GrantFiled: September 4, 2020Date of Patent: May 31, 2022Assignee: Lexmark International, Inc.Inventors: James Howard Ellis, Keith Bryan Hardin, William Pohl Corbett, Jr.
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Patent number: 11340312Abstract: A magnetic sensor array device is described that is constructed with multiple sensors integrated on a common silicon die, diced and packaged in a wafer level package (WLP). The device comprises an array of multi-axis magnetic sensors that can measure the multi-dimensional magnetic field of an arbitrary sized two-dimensional region with high spatial resolution, reduced sensing distance, higher measurement throughput, tolerance to motion, improved temperature measurement, and improved yield when placed on a circuit card comprises part of an authentication system including a physical unclonable function (“PUF”), a substrate, a plurality of magnetized particles randomly dispersed in the substrate, and a PUF reader constructed using one or more of the magnetic sensor array devices wherein the PUF reader measures the magnetic field at multiple locations in close proximity to the magnetized particles. The measured magnetic field data may be compared to previously enrolled data to assess authenticity.Type: GrantFiled: September 4, 2020Date of Patent: May 24, 2022Assignee: Lexmark International, Inc.Inventors: James Howard Ellis, Keith Bryan Hardin, William Pohl Corbett, Jr.
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Publication number: 20220120828Abstract: A magnetic sensor device with an array of magnetic sensors arranged on a common semiconductor substrate to measure the multi-axis magnetic field of an arbitrary region with high spatial resolution, reduced sensing distance, higher measurement throughput, motion tolerance, temperature tolerance, and improved manufacturing yield. A multi-axis magnetic sensor array device fabricated on a common semiconductor substrate is optimized offering additional improvements to reduce measurement time, increase spatial resolution uniformity, and lower thermal compensation cost. Further, the central area of a surface is utilized to measure the normal magnetic field. A perimeter of Hall effect plates measuring the components of the magnetic field in the plane of the measuring surface, which allows for a very high density of normal field measurements allows calculation of the in-plane field components. Error along the edges can be mitigated with the in-plane measured components.Type: ApplicationFiled: December 30, 2021Publication date: April 21, 2022Inventors: JAMES HOWARD ELLIS, JR., KEITH BRYAN HARDIN
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Publication number: 20220065910Abstract: Described is an invention that adds capacitive sensing ability with a single magnetic field sensor location or distributed within an array of surfaces of the sensor. The capacitive sensing can be achieved by modifying a classic Hall effect sensor or putting separate capacitive sensor plates in close proximity to the hall effect sensor.Type: ApplicationFiled: September 2, 2021Publication date: March 3, 2022Inventors: James Howard Ellis, JR., Keith Bryan Hardin
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Publication number: 20210396821Abstract: A magnetic sensor array device is comprised of an array of magnetic sensors arranged on a common semiconductor substrate to measure the multi-axis magnetic field of an arbitrary sized region at high speed with high spatial resolution and high magnetic resolution. This invention further improves a multi-axis magnetic sensor array device fabricated on a common semiconductor substrate with additional optimizations to provide for variable spatial resolution, variable magnetic resolution, and a novel secret key derivation.Type: ApplicationFiled: September 2, 2021Publication date: December 23, 2021Inventors: James Howard Ellis, JR., Keith Bryan Hardin
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Publication number: 20210278483Abstract: A magnetic sensor device with an array of magnetic sensors arranged on a common semiconductor substrate to measure the multi-axis magnetic field of an arbitrary region with high spatial resolution, reduced sensing distance, higher measurement throughput, motion tolerance, temperature tolerance, and improved manufacturing yield. A multi-axis magnetic sensor array device fabricated on a common semiconductor substrate is optimized offering additional improvements to reduce measurement time, increase spatial resolution uniformity, and lower thermal compensation cost. Further, the central area of a surface is utilized to measure the normal magnetic field. A perimeter of Hall effect plates measuring the components of the magnetic field in the plane of the measuring surface, which allows for a very high density of normal field measurements allows calculation of the in-plane field components. Error along the edges can be mitigated with the in-plane measured components.Type: ApplicationFiled: March 5, 2021Publication date: September 9, 2021Inventors: JAMES HOWARD ELLIS, JR., KEITH BRYAN HARDIN
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Publication number: 20210266159Abstract: The present invention is a diverse acoustical object containing a range of particles that have acoustical wave impedances that are substantially different from the binder. The particles create a substantially different reflection as an acoustic wave is scattered by the particles. A negative reflection is created when the scattered wave is from a particle that has a wave impedance that is substantially less than the binder impedance. Practically, it may be necessary to encase this material in a thin material that will withstand the fabrication process (e.g., air or silicone elastomer could be encased in glass). If the wavelength is large compared to the encasing material thickness, then the reflection will be more dependent on the interior material. A mixture of materials that generate positive as well as negative reflections within the binder would add to the complexity of the PUF.Type: ApplicationFiled: February 24, 2021Publication date: August 26, 2021Inventors: SCOTT RICHARD CASTLE, ALEXANDER LLOYD CHAPMAN, KEITH BRYAN HARDIN
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Publication number: 20210252901Abstract: The invention adds a Physical Information Layer (“PIL”) to the magnetic particles within a matrix that creates an unclonable physical unclonable function “object.” The PIL assists in searching to find the combination that matches a pre-determined enrolled combination with additional information that includes a search index, which limits the range of data required to search in order to find a match in the enrolled database. The index could be a predetermined value that associates the random magnetic profile values to a list of enrolled values in a database. The additional information may include product or general information that needs to be easily communicated to a user of the PUF.Type: ApplicationFiled: March 12, 2020Publication date: August 19, 2021Inventor: Keith Bryan Hardin
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Patent number: 10921393Abstract: A system for use in authentication processes is described comprising a physical unclonable function (“PUF”), a substrate, a plurality of magnetized particles randomly dispersed in the substrate, a PUF reader constructed using multiple discrete magnetometer chips that have magnetic field sensors, placed on a circuit card in an array with a sufficient center to center spacing between sensing elements of adjacent magnetometer chips, wherein the PUF reader measures the magnetic field data at multiple locations in close proximity to the magnetized particles. The measured magnetic field data may be compared to previously enrolled data to assess authenticity.Type: GrantFiled: June 3, 2019Date of Patent: February 16, 2021Assignee: LEXMARK INTERNATIONAL, INC.Inventors: William Pohl Corbett, Gary Allen Denton, James Paul Drummond, Keith Bryan Hardin, Kelly Ann Killeen, Randal Scott Williamson