Patents by Inventor John Clay Greene

John Clay Greene 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).

  • Multi-transceiver RFID reader system with centralized control and frequency source
    Patent number: 8174363
    Abstract: Embodiments of the present invention provide RFID systems having a centralized frequency source and controller. The centralized frequency source generates a reference signal, having a frequency below the RF band of interest, which is transmitted to a plurality of reader nodes. The centralized controller generates and transmits data to the plurality of reader nodes. At each reader node, the reference signal is converted to an RF carrier signal that is modulated and transmitted within corresponding read field of the reader node. This modulated RF carrier signal may interrogate and communicate with one or more RFID tags within this read field. The RF carrier signal may also be held constant to enable communication from RFID tags to the reader node, which is subsequently transmitted back to the centralized controller or processor.
    Type: Grant
    Filed: July 16, 2008
    Date of Patent: May 8, 2012
    Assignee: Maxim Integrated Products, Inc.
    Inventor: John Clay Greene
  • Multi-Transceiver RFID Reader System with Centralized Control and Frequency Source
    Publication number: 20100013598
    Abstract: Embodiments of the present invention provide RFID systems having a centralized frequency source and controller. The centralized frequency source generates a reference signal, having a frequency below the RF band of interest, which is transmitted to a plurality of reader nodes. The centralized controller generates and transmits data to the plurality of reader nodes. At each reader node, the reference signal is converted to an RF carrier signal that is modulated and transmitted within corresponding read field of the reader node. This modulated RF carrier signal may interrogate and communicate with one or more RFID tags within this read field. The RF carrier signal may also be held constant to enable communication from RFID tags to the reader node, which is subsequently transmitted back to the centralized controller or processor.
    Type: Application
    Filed: July 16, 2008
    Publication date: January 21, 2010
    Inventor: John Clay Greene