Patents by Inventor John Irving Upshur

John Irving Upshur 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).

  • Asymmetric response bandpass filter having resonators with minimum couplings
    Patent number: 6337610
    Abstract: Asynchronously-tuned coupled resonator cavities are implemented having a minimum set of inter-resonator couplings, wherein the filter design incorporates only series and parallel couplings. By way of example, 8th order filter topologies having three transmission zeros, no cross-couplings, and only eight series and/or parallel couplings can be achieved.
    Type: Grant
    Filed: November 22, 1999
    Date of Patent: January 8, 2002
    Assignee: Comsat Corporation
    Inventors: Albert Edward Williams, John Irving Upshur, Mohammed Mahbubur Rahman