Patents by Inventor Stephen Porter Bush
Stephen Porter Bush 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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Publication number: 20240094925Abstract: An example method for restricting read access to content in the component circuitry and securing data in the supply item is disclosed. The method identifies the status of a read command, and depending upon whether the status disabled or enabled, either blocks the accessing of encrypted data stored in the supply chip or allows the accessing of the encrypted data stored in the supply chip.Type: ApplicationFiled: November 27, 2023Publication date: March 21, 2024Inventors: Stephen Porter Bush, Jennifer Topmiller Williams
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Publication number: 20230153104Abstract: A method for updating an imaging device is described comprising, receiving update information comprising a compatibility update filter indicating which generations of supply item are compatible with the imaging device, and updating a compatibility filter of the imaging device based on the update information, the compatibility filter configured to control which generations of supply item are classified as compatible with the imaging device. An imaging device is also described that comprises firmware and a memory, the memory storing a compatibility filter configured to control which generations of supply item are classified as compatible, wherein the firmware is configured to read the compatibility filter, and the imaging device is configured to update the compatibility filter. Finally, an imaging device supply item is also described.Type: ApplicationFiled: June 1, 2022Publication date: May 18, 2023Inventors: Stephen Porter Bush, Timothy John Rademacher, Jennifer Topmiller Williams
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Publication number: 20230120750Abstract: A method for updating an imaging device is described. The method comprises: receiving update information from a memory of a supply item, the update information comprising an update value, and updating a firmware variable of the imaging device based on the update information. An imaging device is also described that comprises firmware and memory, the memory storing a firmware variable, wherein the firmware is configured to read the firmware variable, and the imaging device is configured to update the firmware variable, by: receiving update information from a memory of a supply item, the update information comprising an update value, and updating the firmware variable of the imaging device based on the update information. An imaging device supply item is also described. The supply item comprises a memory, the memory storing update information, the update information comprising an update value, and the supply item being configured to send the update information.Type: ApplicationFiled: April 23, 2022Publication date: April 20, 2023Inventors: Stephen Porter Bush, Timothy John Rademacher, Jennifer Topmiller Williams
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Publication number: 20230069877Abstract: An example method for restricting read access to content in the component circuitry and securing data in the supply item is disclosed. The method identifies the status of a read command, and depending upon whether the status disabled or enabled, either blocks the accessing of encrypted data stored in the supply chip, or allows the accessing of the encrypted data stored in the supply chip.Type: ApplicationFiled: November 15, 2022Publication date: March 9, 2023Inventors: Stephen Porter Bush, Jennifer Topmiller Williams
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Patent number: 11531477Abstract: An example method for restricting read access to content in the component circuitry and securing data in the supply item is disclosed. The method identifies the status of a read command, and depending upon whether the status disabled or enabled, either blocks the accessing of encrypted data stored in the supply chip, or allows the accessing of the encrypted data stored in the supply chip.Type: GrantFiled: March 19, 2021Date of Patent: December 20, 2022Assignee: LEXMARK INTERNATIONAL, INC.Inventors: Stephen Porter Bush, Jennifer Topmiller Williams
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Publication number: 20220337724Abstract: A supply item has toner for use in an imaging device. A chip has memory storing quanta indicating allowed usage of the supply item over its lifetime and a multiplier correlating the quanta to toner mass. The imaging device requires quanta to conduct imaging operations and loads the quanta and multiplier by way of a certificate stored in the memory. The imaging device retrieves quanta from the chip over time and both devices keep tally. Initialization between the supply item and imaging device includes providing encrypted and unencrypted instances of firmware versions and certificates from the supply item that the imaging device can compare for security. Alternatively, the supply item defines a fuser assembly, imaging unit, intermediate transfer member, or other component installed for use in the imaging device.Type: ApplicationFiled: July 5, 2022Publication date: October 20, 2022Inventors: STEPHEN PORTER BUSH, TIMOTHY JOHN RADEMACHER, CHRISTOHPER ALAN ADKINS
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Publication number: 20220300778Abstract: An imaging system comprising: a system control component having host firmware stored thereon, the system control component comprising a print head operation module actuatable by the host firmware to transmit signals to a print head of the imaging system, the signals configured to cause the print head to operate; and a monitor-enforce module, the monitor-enforce module comprising: a monitor interface configured to receive security information from a security device of the imaging system, and an enforce module, the enforce module being configured to selectively interrupt said signals transmitted by the print head operation module, based on the security information.Type: ApplicationFiled: October 11, 2021Publication date: September 22, 2022Inventors: STEPHEN PORTER BUSH, TIMOTHY JOHN RADEMACHER
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Publication number: 20210208797Abstract: An example method for restricting read access to content in the component circuitry and securing data in the supply item is disclosed. The method identifies the status of a read command, and depending upon whether the status disabled or enabled, either blocks the accessing of encrypted data stored in the supply chip, or allows the accessing of the encrypted data stored in the supply chip.Type: ApplicationFiled: March 19, 2021Publication date: July 8, 2021Inventors: Stephen Porter Bush, Jennifer Topmiller Williams
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Patent number: 10990300Abstract: An example method for restricting read access to content in the component circuitry and securing data in the supply item is disclosed. The method identifies the status of a read command, and depending upon whether the status disabled or enabled, either blocks the accessing of encrypted data stored in the supply chip, or allows the accessing of the encrypted data stored in the supply chip.Type: GrantFiled: April 15, 2019Date of Patent: April 27, 2021Assignee: LEXMARK INTERNATIONAL, INC.Inventors: Stephen Porter Bush, Jennifer Topmiller Williams
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Publication number: 20210120147Abstract: A supply item has toner for use in an imaging device. A chip has memory storing quanta indicating allowed usage of the supply item over its lifetime and a multiplier correlating the quanta to toner mass. The imaging device requires quanta to conduct imaging operations and loads the quanta and multiplier by way of a certificate stored in the memory. The imaging device retrieves quanta from the chip over time and both devices keep tally. Initialization between the supply item and imaging device includes providing encrypted and unencrypted instances of firmware versions and certificates from the supply item that the imaging device can compare for security. Alternatively, the supply item defines a fuser assembly, imaging unit, intermediate transfer member, or other component installed for use in the imaging device.Type: ApplicationFiled: December 8, 2020Publication date: April 22, 2021Inventors: STEPHEN PORTER BUSH, TIMOTHY JOHN RADEMACHER, CHRISTOHPER ALAN ADKINS
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Publication number: 20210099417Abstract: A method of determining addresses for a plurality of components includes receiving, by a slave device, an address change request from a master device. The slave device may be one of the plurality of components or a security module separate from the master device. In response to the received address change request received, a pseudorandom number generator (PRNG) state is updated based on a previous state thereof. The method further includes, retrieving, for each component, a set of bits from the PRNG state to form a candidate address for the component and determining a new component address for the component based on the candidate address. As a result, new component addresses of the plurality of components are determined based on different sets of bits retrieved from the same PRNG state.Type: ApplicationFiled: April 16, 2019Publication date: April 1, 2021Inventors: Stephen Porter Bush, Timothy John Rademacher
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Patent number: 10880454Abstract: A supply item has toner for use in an imaging device. A chip has memory storing quanta indicating allowed usage of the supply item over its lifetime and a multiplier correlating the quanta to toner mass. The imaging device requires quanta to conduct imaging operations and loads the quanta and multiplier by way of a certificate stored in the memory. The imaging device retrieves quanta from the chip over time and both devices keep tally. Initialization between the supply item and imaging device includes providing encrypted and unencrypted instances of firmware versions and certificates from the supply item that the imaging device can compare for security. Alternatively, the supply item defines a fuser assembly, imaging unit, intermediate transfer member, or other component installed for use in the imaging device.Type: GrantFiled: August 5, 2019Date of Patent: December 29, 2020Assignee: LEXMARK INTERNATIONAL, INC.Inventors: Stephen Porter Bush, Timothy John Rademacher, Christopher Alan Adkins
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Publication number: 20200004476Abstract: Component circuitry for a replaceable printer component includes an interface for coupling to a master device and an address generator coupled to the interface for generating a plurality of addresses for a plurality of components. When the interface receives a command from the master device, the address generator updates a pseudorandom number generator (PRNG) state and generates the plurality of addresses by retrieving different sets of bits from the PRNG state for each of the plurality of components. For each of the plurality of components, the component circuitry assigns one of the plurality of addresses to one of the plurality of components based upon a value associated with the one component.Type: ApplicationFiled: September 11, 2019Publication date: January 2, 2020Inventors: Stephen Porter Bush, Timothy John Rademacher
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Publication number: 20190356817Abstract: A supply item has toner for use in an imaging device. A chip has memory storing quanta indicating allowed usage of the supply item over its lifetime and a multiplier correlating the quanta to toner mass. The imaging device requires quanta to conduct imaging operations and loads the quanta and multiplier by way of a certificate stored in the memory. The imaging device retrieves quanta from the chip over time and both devices keep tally. Initialization between the supply item and imaging device includes providing encrypted and unencrypted instances of firmware versions and certificates from the supply item that the imaging device can compare for security. Alternatively, the supply item defines a fuser assembly, imaging unit, intermediate transfer member, or other component installed for use in the imaging device.Type: ApplicationFiled: August 5, 2019Publication date: November 21, 2019Inventors: STEPHEN PORTER BUSH, TIMOTHY JOHN RADEMACHER, CHRISTOPHER ALAN ADKINS
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Publication number: 20190339884Abstract: An example component circuitry for a supply item including an example method for restricting read access to content in the component circuitry are disclosed. In the method, a command for reading data stored in a non-volatile portion of a memory of the supply item is received and depending upon whether the number of times that the command has been received exceeds a predetermined limit, processing the command. The component circuitry has a non-volatile memory and a processor, whereupon the encrypted data may be read from the non-volatile memory if the number of times that the command is received by the processor has not reached a predetermined limit.Type: ApplicationFiled: April 15, 2019Publication date: November 7, 2019Inventors: Stephen Porter Bush, Jennifer Topmiller Williams, Jimmy Daniel Moore, JR.
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Publication number: 20190340372Abstract: An example method for restricting read access to content in the component circuitry and securing data in the supply item is disclosed. The method identifies the status of a read command, and depending upon whether the status disabled or enabled, either blocks the accessing of encrypted data stored in the supply chip, or allows the accessing of the encrypted data stored in the supply chip.Type: ApplicationFiled: April 15, 2019Publication date: November 7, 2019Inventors: Stephen Porter Bush, Jennifer Topmiller Williams
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Publication number: 20190319915Abstract: A method of determining addresses for a plurality of components includes receiving, by a slave device, an address change request from a master device. The slave device may be one of the plurality of components or a security module separate from the master device. In response to the received address change request received, a pseudorandom number generator (PRNG) state is updated based on a previous state thereof. The method further includes, retrieving, for each component, a set of bits from the PRNG state to form a candidate address for the component and determining a new component address for the component based on the candidate address. As a result, new component addresses of the plurality of components are determined based on different sets of bits retrieved from the same PRNG state.Type: ApplicationFiled: April 16, 2018Publication date: October 17, 2019Inventors: Stephen Porter Bush, Timothy John Rademacher
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Publication number: 20190320092Abstract: A supply item has toner for use in an imaging device. A chip has memory storing quanta indicating allowed usage of the supply item over its lifetime and a multiplier correlating the quanta to toner mass. The imaging device requires quanta to conduct imaging operations and loads the quanta and multiplier by way of a certificate stored in the memory. The imaging device retrieves quanta from the chip over time and both devices keep tally. Initialization between the supply item and imaging device includes providing encrypted and unencrypted instances of firmware versions and certificates from the supply item that the imaging device can compare for security. Alternatively, the supply item defines a fuser assembly, imaging unit, intermediate transfer member, or other component installed for use in the imaging device.Type: ApplicationFiled: April 13, 2018Publication date: October 17, 2019Inventors: STEPHEN PORTER BUSH, JENNIFER TOPMILLER WILLIAMS, GREGORY SCOTT WOODS, CHRISTOPHER ALAN ADKINS
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Publication number: 20190320091Abstract: A supply item has toner for use in an imaging device. A chip has memory storing quanta indicating allowed usage of the supply item over its lifetime and a multiplier correlating the quanta to toner mass. The imaging device requires quanta to conduct imaging operations and loads the quanta and multiplier by way of a certificate stored in the memory. The imaging device retrieves quanta from the chip over time and both devices keep tally. Initialization between the supply item and imaging device includes providing encrypted and unencrypted instances of firmware versions and certificates from the supply item that the imaging device can compare for security. Alternatively, the supply item defines a fuser assembly, imaging unit, intermediate transfer member, or other component installed for use in the imaging device.Type: ApplicationFiled: April 13, 2018Publication date: October 17, 2019Inventors: STEPHEN PORTER BUSH, NATHAN WAYNE FOLEY, JENNIFER TOPMILLER WILLIAMS, CHRISTOPHER ALAN ADKINS
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Patent number: 10419641Abstract: A supply item has toner for use in an imaging device. A chip has memory storing quanta indicating allowed usage of the supply item over its lifetime and a multiplier correlating the quanta to toner mass. The imaging device requires quanta to conduct imaging operations and loads the quanta and multiplier by way of a certificate stored in the memory. The imaging device retrieves quanta from the chip over time and both devices keep tally. Initialization between the supply item and imaging device includes providing encrypted and unencrypted instances of firmware versions and certificates from the supply item that the imaging device can compare for security. Alternatively, the supply item defines a fuser assembly, imaging unit, intermediate transfer member, or other component installed for use in the imaging device.Type: GrantFiled: April 13, 2018Date of Patent: September 17, 2019Assignee: Lexmark International, Inc.Inventors: Stephen Porter Bush, Nathan Wayne Foley, Timothy John Rademacher, Jennifer Topmiller Williams, Gregory Scott Woods, Christopher Alan Adkins