Patents by Inventor Kirk Greefkes

Kirk Greefkes 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).

  • Systems and methods for collision avoidance in a multiple RFID interrogator environment
    Patent number: 10474851
    Abstract: A method for collision avoidance in a multi-reader environment comprising a plurality of Radio Frequency Identification (RFID) interrogators, the method comprises each of the plurality of interrogators entering a quiet state during which none of the interrogators transmits, each of the plurality of interrogators selecting a transmit time after the quiet period during which each of the interrogator will attempt to transmit, each of the plurality of interrogators monitoring their associated receive path, an interrogator of the plurality of interrogators transmitting an instruction during its selected transmit time indicating the beginning of a session when the interrogator does not detect data on its receive path prior to its select transmit time, the interrogator comparing its receive path to its transmit path when it transmits the instruction, the interrogator returning to the quiet state when the receive path does not match the transmit path, and the interrogator completing the session when the receive path
    Type: Grant
    Filed: December 6, 2017
    Date of Patent: November 12, 2019
    Assignee: SMARTRAC TECHNOLOGY FLETCHER, INC.
    Inventor: Kirk Greefkes
  • SYSTEMS AND METHODS FOR COLLISION AVOIDANCE IN A MULTIPLE RFID INTERROGATOR ENVIRONMENT
    Publication number: 20180096176
    Abstract: A method for collision avoidance in a multi-reader environment comprising a plurality of Radio Frequency Identification (RFID) interrogators, the method comprises each of the plurality of interrogators entering a quiet state during which none of the interrogators transmits, each of the plurality of interrogators selecting a transmit time after the quiet period during which each of the interrogator will attempt to transmit, each of the plurality of interrogators monitoring their associated receive path, an interrogator of the plurality of interrogators transmitting an instruction during its selected transmit time indicating the beginning of a session when the interrogator does not detect data on its receive path prior to its select transmit time, the interrogator comparing its receive path to its transmit path when it transmits the instruction, the interrogator returning to the quiet state when the receive path does not match the transmit path, and the interrogator completing the session when the receive path
    Type: Application
    Filed: December 6, 2017
    Publication date: April 5, 2018
    Inventor: Kirk Greefkes
  • Systems and methods for collision avoidance in a multiple RFID interrogator environment
    Patent number: 9846794
    Abstract: A method for collision avoidance in a multi-reader environment comprising a plurality of Radio Frequency Identification (RFID) interrogators, the method comprises each of the plurality of interrogators entering a quiet state during which none of the interrogators transmits, each of the plurality of interrogators selecting a transmit time after the quiet period during which each of the interrogator will attempt to transmit, each of the plurality of interrogators monitoring their associated receive path, an interrogator of the plurality of interrogators transmitting an instruction during its selected transmit time indicating the beginning of a session when the interrogator does not detect data on its receive path prior to its select transmit time, the interrogator comparing its receive path to its transmit path when it transmits the instruction, the interrogator returning to the quiet state when the receive path does not match the transmit path, and the interrogator completing the session when the receive path
    Type: Grant
    Filed: May 5, 2015
    Date of Patent: December 19, 2017
    Assignee: NEOLOGY, INC.
    Inventor: Kirk Greefkes
  • RFID interface and interrupt
    Patent number: 9846664
    Abstract: A RFID system includes an RFID controller incorporating a serial bus master coupled via a serial bus to a serial bus slave device, whereby the RFID controller controls power supply and/or power mode of the salve device in order that the slave device is powered and able to communicate with the RFID controller in response to RFID commands received from an RFID reader, and unpowered or in a low power mode otherwise.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: December 19, 2017
    Assignee: Cypress Semiconductor Corporation
    Inventors: Mark R. Whitaker, Kirk Greefkes
  • SYSTEMS AND METHODS FOR COLLISION AVOIDANCE IN A MULTIPLE RFID INTERROGATOR ENVIRONMENT
    Publication number: 20150235062
    Abstract: A method for collision avoidance in a multi-reader environment comprising a plurality of Radio Frequency Identification (RFID) interrogators, the method comprises each of the plurality of interrogators entering a quiet state during which none of the interrogators transmits, each of the plurality of interrogators selecting a transmit time after the quiet period during which each of the interrogator will attempt to transmit, each of the plurality of interrogators monitoring their associated receive path, an interrogator of the plurality of interrogators transmitting an instruction during its selected transmit time indicating the beginning of a session when the interrogator does not detect data on its receive path prior to its select transmit time, the interrogator comparing its receive path to its transmit path when it transmits the instruction, the interrogator returning to the quiet state when the receive path does not match the transmit path, and the interrogator completing the session when the receive path
    Type: Application
    Filed: May 5, 2015
    Publication date: August 20, 2015
    Inventor: Kirk Greefkes
  • RFID Interface and Interrupt
    Publication number: 20150227480
    Abstract: A RFID system includes an RFID controller incorporating a serial bus master coupled via a serial bus to a serial bus slave device, whereby the RFID controller controls power supply and/or power mode of the salve device in order that the slave device is powered and able to communicate with the RFID controller in response to RFID commands received from an RFID reader, and unpowered or in a low power mode otherwise.
    Type: Application
    Filed: March 12, 2015
    Publication date: August 13, 2015
    Inventors: Mark R. Whitaker, Kirk Greefkes
  • Systems and methods for collision avoidance in a multiple RFID interrogator environment
    Patent number: 9035748
    Abstract: A method for collision avoidance in a multi-reader environment comprising a plurality of Radio Frequency Identification (RFID) interrogators, the method comprises each of the plurality of interrogators entering a quiet state during which none of the interrogators transmits, each of the plurality of interrogators selecting a transmit time after the quiet period during which each of the interrogator will attempt to transmit, each of the plurality of interrogators monitoring their associated receive path, an interrogator of the plurality of interrogators transmitting an instruction during its selected transmit time indicating the beginning of a session when the interrogator does not detect data on its receive path prior to its select transmit time, the interrogator comparing its receive path to its transmit path when it transmits the instruction, the interrogator returning to the quiet state when the receive path does not match the transmit path, and the interrogator completing the session when the receive path
    Type: Grant
    Filed: June 27, 2008
    Date of Patent: May 19, 2015
    Assignee: NEOLOGY, INC.
    Inventor: Kirk Greefkes
  • SYSTEMS AND METHODS FOR COLLISION AVOIDANCE IN A MULTIPLE RFID INTERROGATOR ENVIRONMENT
    Publication number: 20090015382
    Abstract: A method for collision avoidance in a multi-reader environment comprising a plurality of Radio Frequency Identification (RFID) interrogators, the method comprises each of the plurality of interrogators entering a quiet state during which none of the interrogators transmits, each of the plurality of interrogators selecting a transmit time after the quiet period during which each of the interrogator will attempt to transmit, each of the plurality of interrogators monitoring their associated receive path, an interrogator of the plurality of interrogators transmitting an instruction during its selected transmit time indicating the beginning of a session when the interrogator does not detect data on its receive path prior to its select transmit time, the interrogator comparing its receive path to its transmit path when it transmits the instruction, the interrogator returning to the quiet state when the receive path does not match the transmit path, and the interrogator completing the session when the receive path
    Type: Application
    Filed: June 27, 2008
    Publication date: January 15, 2009
    Applicant: NEOLOGY, INC.
    Inventor: Kirk Greefkes