Patents by Inventor Christopher J. Diorio

Christopher J. Diorio 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).

  • Patent number: 11514254
    Abstract: RFID-tagged items can be filtered based on relevance estimation or user input. A device reads digital identifiers for multiple RFID-tagged items. The device estimates and selects an item that an individual desires based on one or more metrics, then presents data about the selected item to the individual. If the device receives feedback that the selected item is not the desired item, then the device may estimate and select another item and/or present information about multiple items to allow the individual to select the desired item. When the desired item is selected, the device may perform some associated action.
    Type: Grant
    Filed: October 30, 2020
    Date of Patent: November 29, 2022
    Assignee: Impinj, Inc.
    Inventor: Christopher J. Diorio
  • Patent number: 11514255
    Abstract: RFID readers may be configured to supply power to tags during frequency hops. When a reader is supplying power to a passive RFID tag via a first RF waveform having a first radio frequency and determines that it is to frequency-hop, the reader may determine whether the tag requires power during the hop. If so, the reader begins (or continues) to synthesize a second RF waveform with a second radio frequency while also synthesizing the first RF waveform, and frequency-hops by transitioning from transmitting the first RF waveform to transmitting the second RF waveform such that the power transmitted during the transition is sufficient for the tag to operate.
    Type: Grant
    Filed: May 21, 2021
    Date of Patent: November 29, 2022
    Assignee: Impinj, Inc.
    Inventors: Mike Thomas, Omer Onen, Joe Tarantino, Christopher J. Diorio
  • Publication number: 20220358337
    Abstract: RFID tag ICs may be configured with privacy modes. When a tag IC is in a privacy mode, it will not respond to commands unless a previous command includes correct verification information or specifies a recycling indicator of the tag IC. If the previous command includes correct verification information, then the tag IC will respond to one or more subsequent commands as normal, for example by responding with one or more identifiers. If the previous command does not include correct verification information but specifies a recycling indicator and the privacy mode is recycling-enabled, the tag IC may respond to one or more subsequent commands with recycling information. The recycling information identifies whether or how an item associated with the RFID IC can be recycled or disposed but does not otherwise identify the RFID IC or item. Otherwise, the tag IC may remain silent.
    Type: Application
    Filed: October 28, 2020
    Publication date: November 10, 2022
    Applicant: Impinj, Inc.
    Inventors: Christopher J. DIORIO, Jesse Paul COOKE, Christopher Dean PETERSON
  • Patent number: 11481592
    Abstract: RFID tags capable of transitioning between a private state and one or more public states are provided. In the private state, tags may participate in an inventory round without restriction. In a public state, tags may be prevented from participating in an inventory round, allowed to participate without providing actual identifying information, or allowed to participate providing an alternate identifier. Whether and how the tag responds in a public state may depend on certain conditions including if one or more of the tag's flags are asserted or deasserted. A reader may select a public tag for inventorying by verifying itself, and the tag then asserting or deasserting one or more of its flags accordingly. The asserted or deasserted flag(s) may be used to determine whether and how a tag in a public state participates in an inventory round.
    Type: Grant
    Filed: July 9, 2021
    Date of Patent: October 25, 2022
    Assignee: Impinj, Inc.
    Inventors: Christopher J. Diorio, Joel Peshkin
  • Patent number: 11461570
    Abstract: An RFID-based item tracking system may use statistical methods to determine whether a tag or tagged item that does not respond when inventoried is present in a particular zone or reader antenna field-of-view. In one embodiment, the item tracking system may determine an observability of an item based on one or more initial trials. Upon not detecting the item in one or more subsequent trials, the item tracking system may estimate whether the item is still present based on the observability.
    Type: Grant
    Filed: March 22, 2021
    Date of Patent: October 4, 2022
    Assignee: Impinj, Inc.
    Inventors: Balaji Shyamkumar, Kurt Sundstrom, Scott Cooper, Jayasuryan Iyer, Sandesh Doddameti, Christopher J. Diorio
  • Patent number: 11423278
    Abstract: A Radio Frequency Identification (RFID) integrated circuit (IC) is at least partially covered by a repassivation layer that is, in turn, at least partially covered by a large, electrically conductive contact pad. The repassivation layer is disposed so as to leave uncovered at least one IC contact. The large contact pad is disposed so as to cover the IC IC contact. The large contact pad forms a first galvanic coupling to the IC contact and a second galvanic coupling to a tag antenna. The surface area of the first galvanic coupling is substantially smaller than the surface area of the second galvanic coupling.
    Type: Grant
    Filed: March 23, 2021
    Date of Patent: August 23, 2022
    Assignee: Impinj, Inc.
    Inventors: Ronald L. Koepp, Harley K. Heinrich, Christopher J. Diorio, Tan Mau Wu
  • Patent number: 11403505
    Abstract: An RFID integrated circuit, in addition to having conductive pads to electrically couple to an antenna, may also include a conductive bridge configured to electrically connect different portions of the antenna together. In some embodiments, the conductive bridge may be used to form a multi-turn antenna segment.
    Type: Grant
    Filed: February 26, 2021
    Date of Patent: August 2, 2022
    Assignee: Impinj, Inc.
    Inventors: Christopher J. Diorio, Todd E. Humes, Ronald A. Oliver
  • Patent number: 11361174
    Abstract: 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: Grant
    Filed: May 11, 2020
    Date of Patent: June 14, 2022
    Assignee: Impinj, Inc.
    Inventors: Matthew Robshaw, Christopher J. Diorio
  • Patent number: 11341837
    Abstract: 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: Grant
    Filed: December 28, 2020
    Date of Patent: May 24, 2022
    Assignee: Impinj, Inc.
    Inventors: Christopher J. Diorio, Harley Heinrich, Matthew Robshaw, Theron Stanford, Charles J. T. Peach, John D. Hyde, Tan Mau Wu
  • Patent number: 11288564
    Abstract: RFID inlays or straps may be assembled using impulse heating of metal precursors. Metal precursors are applied to and/or included in contacts on an RFID IC and/or terminals on a substrate. During assembly of the tag, the IC is disposed onto the substrate such that the IC contacts physically contact either the substrate terminals or metal precursors that in turn physically contact the substrate terminals. Impulse heating is then used to rapidly apply heat to the metal precursors, processing them into metallic structures that electrically couple the IC contacts to the substrate terminals.
    Type: Grant
    Filed: November 23, 2020
    Date of Patent: March 29, 2022
    Assignee: Impinj, Inc.
    Inventors: Ronald Lee Koepp, Harley Heinrich, Christopher J. Diorio
  • Patent number: 11244282
    Abstract: An RFID loss-prevention system (LPS) may monitor RFID-tagged items in a facility. An RFID reader transmits a first inventory command configured to cause tags in a first state to respond, receive a reply from a first tag, determine that the first tag has a low transition risk, and cause the first tag to switch to a second state. The reader may also receive a reply from a second tag, determine that the second tag has a high transition risk, and cause the second tag to remain in the first state. The reader may then transmit a second inventory command configured to cause tags in the first state to respond, receive a reply from the second tag in response to the second inventory command, determine that the second tag has inappropriately exited the facility, and issue an alert.
    Type: Grant
    Filed: May 21, 2021
    Date of Patent: February 8, 2022
    Assignee: Impinj, Inc.
    Inventors: Christopher J. Diorio, Alberto Pesavento
  • Patent number: 11232340
    Abstract: 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: Grant
    Filed: June 26, 2020
    Date of Patent: January 25, 2022
    Assignee: Impinj, Inc.
    Inventors: Christopher J. Diorio, Matthew Robshaw, Tan Mau Wu
  • Patent number: 11200387
    Abstract: RFID tags may compensate for non-RFID power sources by automatically enforcing data or state persistence even while powered. A tag may measure a time interval between successive detected modulated reader transmissions. If the interval exceeds a minimum time, then the tag may deassert a protocol flag, erase data, and/or change tag operating states, even if the tag would normally not perform these actions while powered.
    Type: Grant
    Filed: August 10, 2020
    Date of Patent: December 14, 2021
    Assignee: Impinj, Inc.
    Inventors: Theron Stanford, Christopher J. Diorio
  • Patent number: 11120320
    Abstract: 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: Grant
    Filed: January 27, 2020
    Date of Patent: September 14, 2021
    Assignee: Impinj, Inc.
    Inventors: Matthew Robshaw, Tan Mau Wu, Christopher J. Diorio
  • Patent number: 11062190
    Abstract: RFID tags capable of transitioning between a private state and one or more public states are provided. In the private state, tags may participate in an inventory round without restriction. In a public state, tags may be prevented from participating in an inventory round, allowed to participate without providing actual identifying information, or allowed to participate providing an alternate identifier. Whether and how the tag responds in a public state may depend on certain conditions including if one or more of the tag's flags are asserted or deasserted. A reader may select a public tag for inventorying by verifying itself, and the tag then asserting or deasserting one or more of its flags accordingly. The asserted or deasserted flag(s) may be used to determine whether and how a tag in a public state participates in an inventory round.
    Type: Grant
    Filed: August 30, 2019
    Date of Patent: July 13, 2021
    Assignee: Impinj, Inc.
    Inventors: Christopher J. Diorio, Joel Peshkin
  • Patent number: 11017187
    Abstract: RFID readers may be configured to supply power to tags during frequency hops. When a reader is supplying power to a passive RFID tag via a first RF waveform having a first radio frequency and determines that it is to frequency-hop, the reader may determine whether the tag requires power during the hop. If so, the reader begins (or continues) to synthesize a second RF waveform with a second radio frequency while also synthesizing the first RF waveform, and frequency-hops by transitioning from transmitting the first RF waveform to transmitting the second RF waveform such that the power transmitted during the transition is sufficient for the tag to operate.
    Type: Grant
    Filed: June 5, 2020
    Date of Patent: May 25, 2021
    Assignee: Impinj, Inc.
    Inventors: Mike Thomas, Omer Onen, Joe Tarantino, Christopher J. Diorio
  • Patent number: 11017349
    Abstract: An RFID loss-prevention system (LPS) may monitor RFID-tagged items in a facility. An RFID reader transmits a first inventory command configured to cause tags in a first state to respond, receive a reply from a first tag, determine that the first tag has a low transition risk, and cause the first tag to switch to a second state. The reader may also receive a reply from a second tag, determine that the second tag has a high transition risk, and cause the second tag to remain in the first state. The reader may then transmit a second inventory command configured to cause tags in the first state to respond, receive a reply from the second tag in response to the second inventory command, determine that the second tag has inappropriately exited the facility, and issue an alert.
    Type: Grant
    Filed: December 27, 2019
    Date of Patent: May 25, 2021
    Assignee: Impinj, Inc.
    Inventors: Christopher J. Diorio, Alberto Pesavento
  • Patent number: 10956693
    Abstract: An RFID-based item tracking system may use statistical methods to determine whether a tag or tagged item that does not respond when inventoried is present in a particular zone or reader antenna field-of-view. In one embodiment, the item tracking system may determine an observability of an item based on one or more initial trials. Upon not detecting the item in one or more subsequent trials, the item tracking system may estimate whether the item is still present based on the observability.
    Type: Grant
    Filed: February 21, 2020
    Date of Patent: March 23, 2021
    Assignee: Impinj, Inc.
    Inventors: Balaji Shyamkumar, Kurt Sundstrom, Scott Cooper, Jayasuryan Iyer, Sandesh Doddameti, Christopher J. Diorio
  • Patent number: 10936929
    Abstract: An RFID integrated circuit, in addition to having conductive pads to electrically couple to an antenna, may also include a conductive bridge configured to electrically connect different portions of the antenna together. In some embodiments, the conductive bridge may be used to form a multi-turn antenna segment.
    Type: Grant
    Filed: April 22, 2019
    Date of Patent: March 2, 2021
    Assignee: Impinj, Inc.
    Inventors: Christopher J. Diorio, Todd E. Humes, Ronald A. Oliver
  • Patent number: 10929734
    Abstract: An RFID IC may operate at a relatively low clock frequency while impedance matching to an antenna is being tuned to increase the amount of power that the IC can extract from an incident RF wave. A tuning circuit tunes the impedance matching by adjusting a variable impedance coupling the IC and the antenna. The IC may power-up with a low clock frequency or reduce its current clock frequency to a lower clock frequency prior to tuning or during the tuning process, and may increase its clock frequency upon completion of tuning or during the tuning process.
    Type: Grant
    Filed: October 10, 2019
    Date of Patent: February 23, 2021
    Assignee: Impinj, Inc.
    Inventors: John D. Hyde, Shailendra Srinivas, Jay Kuhn, Ronald A. Oliver, Harley Heinrich, Theron Stanford, Christopher J. Diorio