Patents by Inventor Matthew Robshaw
Matthew Robshaw 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: 11798392Abstract: RFID ICs sense and indicate changes in their surrounding environment, such as changes in temperature, humidity, chemical presence, RF signals, and similar. An RFID IC indicates when a significant environmental change has occurred, for example by adjusting the value of a flag, writing data to memory, transmitting a message to an external entity, exiting a sleep state, and/or responding repeatedly to an inventorying reader. In some cases, RFID IC actively notifies an external entity that a significant environmental change has been sensed. For example, RFID IC may alert the external entity by participating in a special inventory process meant for RFID ICs sending environmental change. The RFID IC may alert the external entity by interjecting itself into an inventory round, re-participating in an inventory round, refraining from entering a sleep state after inventorying, and/or adjusting timing of a scheduled reply to communicate with an RFID reader ahead of schedule.Type: GrantFiled: May 20, 2022Date of Patent: October 24, 2023Assignee: Impinj, Inc.Inventors: Christopher J. Diorio, Harley Heinrich, Matthew Robshaw, Theron Stanford, Charles J. T. Peach, John D. Hyde, Tan Mau Wu
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Patent number: 11681889Abstract: RFID technology may be used to provide digital identities for physical items. An RFID IC attached to or integrated into a physical item contains an identifier for the physical item. Digital identity information associated with the item, such as ownership information, history, properties, and the like, may be located on one or more networks. An entity, after authenticating itself and/or the item, may use the identifier to locate, retrieve, and/or update the item's digital identity information on the network.Type: GrantFiled: January 21, 2022Date of Patent: June 20, 2023Assignee: Impinj, Inc.Inventors: Christopher J. Diorio, Matthew Robshaw, Tan Mau Wu
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Patent number: 11651180Abstract: A method is provided to determine unique identifiers. A physical item has an RFID integrated circuit (IC) having a unique identifier and a secret. The RFID IC may be configured to provide an identifier portion and a response to a previously sent challenge, where the identifier portion by itself is insufficient to completely identify the IC or item and the response is based on the challenge and the secret. Attempts are made to verify the response using a set of potential secrets determined using the identifier portion. If the response is successfully verified using a certain secret, the secret may then be used to determine one or more other identifier portions. The unique, complete identifier may then be determined from a combination of at least the identifier portions.Type: GrantFiled: September 13, 2021Date of Patent: May 16, 2023Assignee: Impinj, Inc.Inventors: Matthew Robshaw, Tan Mau Wu, Christopher J. Diorio
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Patent number: 11361174Abstract: An authentication method includes RFID tags authenticating RFID readers. A tag sends a tag identifier and a reader challenge to a reader in response to one or more commands from the reader. The reader then either derives a response to the reader challenge itself or has a verification authority derive the response. The response may be derived from parameter(s) in the reader challenge, and may be derived using a cryptographic key. The reader then sends the response to the tag along with one or more commands. The tag verifies the response before executing action(s) associated with the command(s).Type: GrantFiled: May 11, 2020Date of Patent: June 14, 2022Assignee: Impinj, Inc.Inventors: Matthew Robshaw, Christopher J. Diorio
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Patent number: 11341837Abstract: RFID ICs sense and indicate changes in their surrounding environment, such as changes in temperature, humidity, chemical presence, RF signals, and similar. An RFID IC indicates when a significant environmental change has occurred, for example by adjusting the value of a flag, writing data to memory, transmitting a message to an external entity, exiting a sleep state, and/or responding repeatedly to an inventorying reader. In some cases, RFID IC actively notifies an external entity that a significant environmental change has been sensed. For example, RFID IC may alert the external entity by participating in a special inventory process meant for RFID ICs sending environmental change. The RFID IC may alert the external entity by interjecting itself into an inventory round, re-participating in an inventory round, refraining from entering a sleep state after inventorying, and/or adjusting timing of a scheduled reply to communicate with an RFID reader ahead of schedule.Type: GrantFiled: December 28, 2020Date of Patent: May 24, 2022Assignee: Impinj, Inc.Inventors: Christopher J. Diorio, Harley Heinrich, Matthew Robshaw, Theron Stanford, Charles J. T. Peach, John D. Hyde, Tan Mau Wu
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Patent number: 11232340Abstract: RFID technology may be used to provide digital identities for physical items. An RFID IC attached to or integrated into a physical item contains an identifier for the physical item. Digital identity information associated with the item, such as ownership information, history, properties, and the like, may be located on one or more networks. An entity, after authenticating itself and/or the item, may use the identifier to locate, retrieve, and/or update the item's digital identity information on the network.Type: GrantFiled: June 26, 2020Date of Patent: January 25, 2022Assignee: Impinj, Inc.Inventors: Christopher J. Diorio, Matthew Robshaw, Tan Mau Wu
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Patent number: 11120320Abstract: A method is provided to determine unique identifiers. A physical item has an RFID integrated circuit (IC) having a unique identifier and a secret. The RFID IC may be configured to provide an identifier portion and a response to a previously sent challenge, where the identifier portion by itself is insufficient to completely identify the IC or item and the response is based on the challenge and the secret. Attempts are made to verify the response using a set of potential secrets determined using the identifier portion. If the response is successfully verified using a certain secret, the secret may then be used to determine one or more other identifier portions. The unique, complete identifier may then be determined from a combination of at least the identifier portions.Type: GrantFiled: January 27, 2020Date of Patent: September 14, 2021Assignee: Impinj, Inc.Inventors: Matthew Robshaw, Tan Mau Wu, Christopher J. Diorio
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Patent number: 10916114Abstract: Methods and systems are described for authorizing an item with an RFID tag to leave a facility. In one embodiment, a mobile device receives or determines an exit code (EC) to write into the tag in response to providing authorizing information. The EC may be based on information stored in the tag such as the tag's item identifier or other tag information (collectively an item identifier or II), a ticket value, other information such as the OC, a mobile identity or location, or any other suitable information. Upon verification of the EC, the tagged item is allowed to leave the facility. In another embodiment, the mobile device stores an item identifier (II) associated with the tag and provides authorizing information. Upon verifying the authorizing information and confirming that the stored II corresponds to the tagged item's II, the tagged item is allowed to leave the facility.Type: GrantFiled: March 23, 2020Date of Patent: February 9, 2021Assignee: Impinj, Inc.Inventors: Christopher J. Diorio, Scott A. Cooper, Matthew Robshaw, Tan Mau Wu
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Patent number: 10878685Abstract: RFID ICs sense and indicate changes in their surrounding environment, such as changes in temperature, humidity, chemical presence, RF signals, and similar. An RFID IC indicates when a significant environmental change has occurred, for example by adjusting the value of a flag, writing data to memory, transmitting a message to an external entity, exiting a sleep state, and/or responding repeatedly to an inventorying reader. In some cases, RFID IC actively notifies an external entity that a significant environmental change has been sensed. For example, RFID IC may alert the external entity by participating in a special inventory process meant for RFID ICs sending environmental change. The RFID IC may alert the external entity by interjecting itself into an inventory round, re-participating in an inventory round, refraining from entering a sleep state after inventorying, and/or adjusting timing of a scheduled reply to communicate with an RFID reader ahead of schedule.Type: GrantFiled: April 12, 2019Date of Patent: December 29, 2020Assignee: Impinj, Inc.Inventors: Christopher J. Diorio, Harley Heinrich, Matthew Robshaw, Theron Stanford, Charles J. T. Peach, John D. Hyde, Tan Mau Wu
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Patent number: 10719671Abstract: Messages may be passed between Radio Frequency Identification (RFID) tags using RFID readers. A first tag with a message intended for a second tag sends the message to an RFID reader. The reader then determines that the destination of the message is the second tag and sends the message to the second tag. The second tag may confirm receipt of the message by sending a receipt confirmation message to the reader for forwarding to the first tag, and/or the reader may itself confirm that the message was sent to the second tag by sending a transmit confirmation message to the first tag.Type: GrantFiled: July 16, 2018Date of Patent: July 21, 2020Assignee: Impinj, Inc.Inventors: Matthew Robshaw, Tan Mau Wu
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Patent number: 10713453Abstract: A Radio Frequency Identification (RFID) system including an RFID reader and a reader proxy authenticates itself to a verification authority. The proxy receives a proxy challenge from a verification authority and determines a proxy response based on the proxy challenge and a proxy key known to the proxy. The proxy response is then sent to the verification authority along with an identifier for the reader. The reader then authenticates an RFID tag by sending a tag response to the verification authority, which determines whether the reader is authentic based on the authenticity of the proxy response.Type: GrantFiled: December 21, 2018Date of Patent: July 14, 2020Assignee: Impinj, Inc.Inventors: Christopher J. Diorio, Scott A. Cooper, Matthew Robshaw
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Patent number: 10699178Abstract: RFID technology may be used to provide digital identities for physical items. An RFID IC attached to or integrated into a physical item contains an identifier for the physical item. Digital identity information associated with the item, such as ownership information, history, properties, and the like, may be located on one or more networks. An entity, after authenticating itself and/or the item, may use the identifier to locate, retrieve, and/or update the item's digital identity information on the network.Type: GrantFiled: September 21, 2018Date of Patent: June 30, 2020Assignee: Impinj, Inc.Inventors: Christopher J. Diorio, Matthew Robshaw, Tan Mau Wu
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Patent number: 10664670Abstract: A Radio Frequency Identification (RFID) reader containing a reader key authenticates an RFID tag containing a tag key by receiving a tag identifier from the tag; challenging the tag with a tag challenge; receiving a tag response based at least on the tag challenge and the tag key but not including the tag key; sending a second message including at least the tag identifier and the tag response to a verification authority; and receiving a reply from the verification authority. The reader and the verification authority may mutually authenticate each other before, during, or after the tag authentication process. The verification authority may notify a designated party if a response is incorrect.Type: GrantFiled: November 29, 2018Date of Patent: May 26, 2020Assignee: Inpinj, Inc.Inventors: Christopher J. Diorio, Scott A. Cooper, Matthew Robshaw
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Patent number: 10650202Abstract: An authentication method includes RFID tags authenticating RFID readers. A tag sends a tag identifier and a reader challenge to a reader in response to one or more commands from the reader. The reader then either derives a response to the reader challenge itself or has a verification authority derive the response. The response may be derived from parameter(s) in the reader challenge, and may be derived using a cryptographic key. The reader then sends the response to the tag along with one or more commands. The tag verifies the response before executing action(s) associated with the command(s).Type: GrantFiled: November 5, 2018Date of Patent: May 12, 2020Assignee: Impinj, Inc.Inventors: Matthew Robshaw, Christopher J. Diorio
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Patent number: 10600298Abstract: Methods and systems are described for authorizing an item with an RFID tag to leave a facility. In one embodiment, a mobile device receives or determines an exit code (EC) to write into the tag in response to providing authorizing information. The EC may be based on information stored in the tag such as the tag's item identifier or other tag information (collectively an item identifier or II), a ticket value, other information such as the OC, a mobile identity or location, or any other suitable information. Upon verification of the EC, the tagged item is allowed to leave the facility. In another embodiment, the mobile device stores an item identifier (II) associated with the tag and provides authorizing information. Upon verifying the authorizing information and confirming that the stored II corresponds to the tagged item's II, the tagged item is allowed to leave the facility.Type: GrantFiled: January 18, 2019Date of Patent: March 24, 2020Assignee: Impinj, Inc.Inventors: Christopher J. Diorio, Scott A. Cooper, Matthew Robshaw, Tan Mau Wu
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Patent number: 10430623Abstract: RFID readers such as synthesized-beam readers may be used to track RFID tags of interest. When a tag of interest is detected, a reader may choose to keep the tag of interest from entering a quiet state, which a detected tag may normally enter. Subsequently, the tag of interest can respond more frequently than a tag in the quiet state, allowing the reader to track any movement of the tag of interest and determine a tag trajectory. The reader may further use the determined trajectory to cooperatively-power the tag of interest.Type: GrantFiled: June 29, 2018Date of Patent: October 1, 2019Assignee: Impinj, Inc.Inventors: Alberto Pesavento, Christopher J. Diorio, Matthew Robshaw
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Patent number: 10186127Abstract: Methods and systems are described for authorizing an item with an RFID tag to leave a facility. In one embodiment, a mobile device receives or determines an exit code (EC) to write into the tag in response to providing authorizing information. The EC may be based on information stored in the tag such as the tag's item identifier or other tag information (collectively an item identifier or II), a ticket value, other information such as the OC, a mobile identity or location, or any other suitable information. Upon verification of the EC, the tagged item is allowed to leave the facility. In another embodiment, the mobile device stores an item identifier (II) associated with the tag and provides authorizing information. Upon verifying the authorizing information and confirming that the stored II corresponds to the tagged item's II, the tagged item is allowed to leave the facility.Type: GrantFiled: May 19, 2017Date of Patent: January 22, 2019Assignee: Impinj, Inc.Inventors: Christopher J. Diorio, Scott A. Cooper, Matthew Robshaw, Tan Mau Wu
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Patent number: 10169625Abstract: A Radio Frequency Identification (RFID) system including an RFID reader and a reader proxy authenticates itself to a verification authority. The proxy receives a proxy challenge from a verification authority and determines a proxy response based on the proxy challenge and a proxy key known to the proxy. The proxy response is then sent to the verification authority along with an identifier for the reader. The reader then authenticates an RFID tag by sending a tag response to the verification authority, which determines whether the reader is authentic based on the authenticity of the proxy response.Type: GrantFiled: May 24, 2017Date of Patent: January 1, 2019Assignee: Impinj, Inc.Inventors: Christopher J. Diorio, Scott A. Cooper, Matthew Robshaw
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Patent number: 10146969Abstract: A Radio Frequency Identification (RFID) reader containing a reader key authenticates an RFID tag containing a tag key by receiving a tag identifier from the tag; challenging the tag with a tag challenge; receiving a tag response based at least on the tag challenge and the tag key but not including the tag key; sending a second message including at least the tag identifier and the tag response to a verification authority; and receiving a reply from the verification authority. The reader and the verification authority may mutually authenticate each other before, during, or after the tag authentication process. The verification authority may notify a designated party if a response is incorrect.Type: GrantFiled: August 22, 2017Date of Patent: December 4, 2018Assignee: Impinj, Inc.Inventors: Christopher J. Diorio, Scott A. Cooper, Matthew Robshaw
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Patent number: 10121033Abstract: An authentication method includes RFID tags authenticating RFID readers. A tag sends a tag identifier and a reader challenge to a reader in response to one or more commands from the reader. The reader then either derives a response to the reader challenge itself or has a verification authority derive the response. The response may be derived from parameter(s) in the reader challenge, and may be derived using a cryptographic key. The reader then sends the response to the tag along with one or more commands. The tag verifies the response before executing action(s) associated with the command(s).Type: GrantFiled: March 5, 2018Date of Patent: November 6, 2018Assignee: Impinj, Inc.Inventors: Matthew Robshaw, Christopher J. Diorio