Patents by Inventor William C. Egbert

William C. Egbert 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).

  • Ultra high frequency radio frequency identification tag
    Patent number: 7215295
    Abstract: An antenna design for radio frequency identification (“RFID”) tags. More particularly, the present invention relates to design for RFID tags particularly operating in the ultra high frequency (“UHF”) operating band.
    Type: Grant
    Filed: October 25, 2005
    Date of Patent: May 8, 2007
    Assignee: 3M Innovative Properties Company
    Inventor: William C. Egbert
  • Ultra high frequency radio frequency identification tag
    Patent number: 6999028
    Abstract: An antenna design for radio frequency identification (“RFID”) tags. More particularly, the present invention relates to design for RFID tags particularly operating in the ultra high frequency (“UHF”) operating band.
    Type: Grant
    Filed: December 23, 2003
    Date of Patent: February 14, 2006
    Assignee: 3M Innovative Properties Company
    Inventor: William C. Egbert
  • RFID tag with bridge circuit assembly and methods of use
    Patent number: 6693541
    Abstract: Radio frequency identification tag devices with bridge circuit assemblies and methods for high-volume, low-cost production are disclosed. The bridge circuit assemblies and methods of the present invention can reduce the complexity of the RFID tag devices by providing a one-sided circuit design. The resonant frequency of the circuits formed on the devices may be tuned by severing selected connections to one or more tuning capacitor plates that form a part of the capacitor structure. Severing connections to the tuning capacitor plates changes the capacitance of the circuit that, in turn, changes the resonant frequency of the circuit. Further, the devices and methods of the present invention allow for the option of placing a die either on the antenna substrate or on the bridge circuit assembly.
    Type: Grant
    Filed: July 19, 2001
    Date of Patent: February 17, 2004
    Inventor: William C. Egbert
  • RFID tag with bridge circuit assembly and methods of use
    Publication number: 20030016133
    Abstract: Radio frequency identification tag devices with bridge circuit assemblies and methods for high-volume, low-cost production are disclosed. The bridge circuit assemblies and methods of the present invention can reduce the complexity of the RFID tag devices by providing a one-sided circuit design. The resonant frequency of the circuits formed on the devices may be tuned by severing selected connections to one or more tuning capacitor plates that form a part of the capacitor structure. Severing connections to the tuning capacitor plates changes the capacitance of the circuit that, in turn, changes the resonant frequency of the circuit. Further, the devices and methods of the present invention allow for the option of placing a die either on the antenna substrate or on the bridge circuit assembly.
    Type: Application
    Filed: July 19, 2001
    Publication date: January 23, 2003
    Applicant: 3M Innovative Properties Company
    Inventor: William C. Egbert
  • RFID tag device and method of manufacturing
    Patent number: 6407669
    Abstract: Folded radio frequency identification tag devices and methods for high-volume, low-cost production are disclosed. The folded construction of the devices and methods of the present invention can reduce the complexity of the RFID tags by providing a one-sided circuit design. The resonant frequency of the circuits formed on the devices may be tuned by severing selected connections to one or more tuning capacitor plates that form a part of the capacitor structure. Severing connections to the tuning capacitor plates changes the capacitance of the circuit which, in turn, changes the resonant frequency of the circuit.
    Type: Grant
    Filed: February 2, 2001
    Date of Patent: June 18, 2002
    Assignee: 3M Innovative Properties Company
    Inventors: Katherine A. Brown, James N. Dobbs, William C. Egbert, Luther E. Erickson, John S. Huizinga, Gregory F. King