Patents by Inventor Gary Allen Denton

Gary Allen Denton 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).

  • Publication number: 20190143569
    Abstract: A method of manufacturing a physical unclonable function is disclosed. A highly random distribution of magnetic particles within a thermoplastic polymer is created by magnetizing magnetizable particles in solid pellet feed material before feeding the solid pellets into an injection molding machine. Other devices and processes are disclosed.
    Type: Application
    Filed: October 25, 2018
    Publication date: May 16, 2019
    Inventors: Gary Allen Denton, James Paul Drummond, Kelly Ann Killeen
  • Publication number: 20190143570
    Abstract: A physical unclonable function is disclosed. A highly random distribution of magnetic particles within a thermoplastic polymer is created by magnetizing magnetizable particles in solid pellet feed material before feeding the solid pellets into an injection molding machine. Other devices and processes are disclosed.
    Type: Application
    Filed: October 25, 2018
    Publication date: May 16, 2019
    Inventors: Gary Allen Denton, James Paul Drummond, Kelly Ann Killeen
  • Patent number: 10212300
    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.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: February 19, 2019
    Assignee: Lexmark International, Inc.
    Inventors: Roger Steven Cannon, Gary Allen Denton, Graydon Randall Dodson, Keith Bryan Hardin
  • Patent number: 10102466
    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.
    Type: Grant
    Filed: December 14, 2016
    Date of Patent: October 16, 2018
    Assignee: Lexmark International, Inc.
    Inventors: Roger Steven Cannon, Gary Allen Denton, Graydon Randall Dodson, Keith Bryan Hardin
  • Publication number: 20180167526
    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.
    Type: Application
    Filed: December 9, 2016
    Publication date: June 14, 2018
    Inventors: Roger Steven Cannon, Gary Allen Denton, Graydon Randall Dodson, Keith Bryan Hardin
  • Publication number: 20180165558
    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.
    Type: Application
    Filed: December 14, 2016
    Publication date: June 14, 2018
    Inventors: Roger Steven Cannon, Gary Allen Denton, Graydon Randall Dodson, Keith Bryan Hardin
  • Patent number: 9929864
    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.
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: March 27, 2018
    Assignee: Lexmark International, Inc.
    Inventors: James Ronald Booth, Roger Steven Cannon, Gary Allen Denton, James Paul Drummond, Kelly Ann Killeen
  • Patent number: 9917699
    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.
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: March 13, 2018
    Assignee: Lexmark International, Inc.
    Inventors: James Ronald Booth, Roger Steven Cannon, Gary Allen Denton, James Paul Drummond, Kelly Ann Killeen
  • Publication number: 20170344536
    Abstract: A physical unclonable function (PUF) apparatus having magnetic particles is disclosed. The magnetic field data and the image view of the magnetic particles in the PUF apparatus are difficult to counterfeit. A PUF apparatus may be incorporated into a user-replaceable supply item for an imaging device. Further, a PUF reader may be incorporated into an imaging device to read the PUF. Other systems are disclosed.
    Type: Application
    Filed: June 22, 2017
    Publication date: November 30, 2017
    Inventors: James Ronald Booth, Roger Steven Cannon, Gary Allen Denton, James Paul Drummond, Kelly Ann Killeen
  • Publication number: 20170308006
    Abstract: A developer roll according to one example embodiment includes a core including at least one permanent magnet forming a magnetized portion of the core. A cylindrical sleeve positioned around the core is rotatable relative to the core about an axis of rotation in an operative rotational direction. A release pole of the permanent magnet is positioned to magnetically attract developer mix to an outer circumferential surface of the sleeve to transport developer mix on the surface of the sleeve in the operative rotational direction when the sleeve rotates relative to the core to a release point where a magnetic field of the permanent magnet is insufficient to retain developer mix against the surface of the sleeve. An axial length of the magnetized portion of the core decreases at both axial ends of the core as the magnetized portion of the core approaches the release point in the operative rotational direction.
    Type: Application
    Filed: April 25, 2016
    Publication date: October 26, 2017
    Inventors: GREGORY ALAN CAVILL, GARY ALLEN DENTON, MATTHEW LEE ROGERS, KATHERINE MARIE GILLIAM
  • Patent number: 9791806
    Abstract: A developer roll according to one example embodiment includes a core including at least one permanent magnet forming a magnetized portion of the core. A cylindrical sleeve positioned around the core is rotatable relative to the core about an axis of rotation in an operative rotational direction. A release pole of the permanent magnet is positioned to magnetically attract developer mix to an outer circumferential surface of the sleeve to transport developer mix on the surface of the sleeve in the operative rotational direction when the sleeve rotates relative to the core to a release point where a magnetic field of the permanent magnet is insufficient to retain developer mix against the surface of the sleeve. An axial length of the magnetized portion of the core decreases at both axial ends of the core as the magnetized portion of the core approaches the release point in the operative rotational direction.
    Type: Grant
    Filed: April 25, 2016
    Date of Patent: October 17, 2017
    Assignee: Lexmark International, Inc.
    Inventors: Gregory Alan Cavill, Gary Allen Denton, Matthew Lee Rogers, Katherine Marie Gilliam
  • Publication number: 20170104600
    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.
    Type: Application
    Filed: October 9, 2015
    Publication date: April 13, 2017
    Inventors: James Ronald Booth, Roger Steven Cannon, Gary Allen Denton, James Paul Drummond, Kelly Ann Killeen
  • Publication number: 20170100862
    Abstract: A physical unclonable function formed by an injection molding machine is disclosed. A highly random distribution of magnetic particles is created by magnetizing magnetizable particles before feeding the particles into the injection molding machine due to turbulence within the injection molding machine. Plastic is also fed into the injection molding machine to suspend the particles. Other devices and processes are disclosed.
    Type: Application
    Filed: June 24, 2016
    Publication date: April 13, 2017
    Inventors: Gary Allen Denton, James Paul Drummond, Kelly Ann Killeen
  • Publication number: 20170102668
    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.
    Type: Application
    Filed: June 24, 2016
    Publication date: April 13, 2017
    Inventors: Roger Steven Cannon, Gary Allen Denton, Kelly Ann Killeen, Randal Scott Williamson
  • Publication number: 20170104601
    Abstract: An elongate physical unclonable function (PUF) is disclosed. The PUF has a longitudinal axis and contains a plurality of small magnetic particles. A much larger magnet is positioned on the longitudinal axis to indicate a home position. A low-cost linear translation mechanism may be used to read the PUF by referencing position information to the home position. Other devices are disclosed.
    Type: Application
    Filed: June 24, 2016
    Publication date: April 13, 2017
    Inventors: Gary Allen Denton, James Paul Drummond, Brian Anthony Reichert, Randal Scott Williamson
  • Publication number: 20170103834
    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.
    Type: Application
    Filed: October 9, 2015
    Publication date: April 13, 2017
    Inventors: James Ronald Booth, Roger Steven Cannon, Gary Allen Denton, James Paul Drummond, Kelly Ann Killeen
  • Publication number: 20170104486
    Abstract: A physical unclonable function (PUF) located on a supply item for an imaging device is disclosed. The PUF has a toothed rack configured to mate with a gear. During reading operations, the gear turns and translates the PUF linearly under a magnetic sensor. This configuration is inexpensive and robust. Other devices are disclosed.
    Type: Application
    Filed: June 24, 2016
    Publication date: April 13, 2017
    Inventors: Gary Allen Denton, Randal Scott Williamson
  • Publication number: 20170103791
    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.
    Type: Application
    Filed: October 9, 2015
    Publication date: April 13, 2017
    Inventors: James Ronald Booth, Roger Steven Cannon, Gary Allen Denton, James Paul Drummond, Kelly Ann Killeen
  • Patent number: 9608634
    Abstract: A physical unclonable function (PUF) located on a supply item for an imaging device is disclosed. The PUF has a toothed rack configured to mate with a gear. During reading operations, the gear turns and translates the PUF linearly under a magnetic sensor. This configuration is inexpensive and robust. Other devices are disclosed.
    Type: Grant
    Filed: June 24, 2016
    Date of Patent: March 28, 2017
    Assignee: Lexmark International, Inc.
    Inventors: Gary Allen Denton, Randal Scott Williamson
  • Patent number: 9608828
    Abstract: An elongate physical unclonable function (PUF) is disclosed. The PUF has a longitudinal axis and contains a plurality of small magnetic particles. A much larger magnet is positioned on the longitudinal axis to indicate a home position. A low-cost linear translation mechanism may be used to read the PUF by referencing position information to the home position. Other devices are disclosed.
    Type: Grant
    Filed: June 24, 2016
    Date of Patent: March 28, 2017
    Assignee: Lexmark International, Inc.
    Inventors: Gary Allen Denton, James Paul Drummond, Brian Anthony Reichert, Randal Scott Williamson