Patents by Inventor Christopher P. Cash

Christopher P. Cash 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).

  • Antenna with variably tuned parasitic element
    Patent number: 6765536
    Abstract: A multi-band radio communication device with an antenna system that includes an antenna element and a parasitic element located in proximity to the antenna element. A tuning circuit is coupled to the parasitic element. The tuning circuit is variable to adjust the parasitic load on the antenna element to provide variable operating frequencies and bandwidths for the communication device.
    Type: Grant
    Filed: May 9, 2002
    Date of Patent: July 20, 2004
    Assignee: Motorola, Inc.
    Inventors: James P. Phillips, Christopher P. Cash, Jeffrey Y. Ho, Narenda Pulimi, Paul W. Reich, Roger L. Scheer
  • Antenna with variably tuned parasitic element
    Publication number: 20030210206
    Abstract: A multi-band radio communication device with an antenna system that includes an antenna element and a parasitic element located in proximity to the antenna element. A tuning circuit is coupled to the parasitic element. The tuning circuit is variable to adjust the parasitic load on the antenna element to provide variable operating frequencies and bandwidths for the communication device.
    Type: Application
    Filed: May 9, 2002
    Publication date: November 13, 2003
    Inventors: James P. Phillips, Christopher P. Cash, Jeffrey Y. Ho, Narendra Pulimi, Paul W. Reich, Roger L. Scheer
  • Antenna with branching arrangement for multiple frequency bands
    Patent number: 6559811
    Abstract: A communication device operable in multiple frequency bands includes a branching antenna adapted to operate in at least two frequency bands. The antenna includes a first conductive element having a connection at one end for driving the antenna. The first conductive element is resonant at a first frequency. On the first conductive element, a feed point is located away from either end of the first conductive element, and particularly the driving connection point. A second conductive element is coupled to the feed point such that the second conductive element in conjunction with the portion of the first conductive element between the drive connection and the feed point is resonant at a second frequency. This allows for a more compact and versatile multi-band antenna.
    Type: Grant
    Filed: January 22, 2002
    Date of Patent: May 6, 2003
    Assignee: Motorola, Inc.
    Inventors: Narendra Pulimi, Christopher P. Cash