Patents by Inventor Stephen A Williams

Stephen A Williams 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).

  • Dual purpose spread spectrum radio receivers with controlled frequency rejection
    Patent number: 6920172
    Abstract: A receiver for a direct sequence spread spectrum signal subject to interference from a locally transmitted or received frequency-hopped spread spectrum signal includes a programmable notch filter which is controlled in accordance with the code sequence of a frequency-hopped signal to reject frequencies corresponding to those producing interference
    Type: Grant
    Filed: January 2, 2001
    Date of Patent: July 19, 2005
    Assignee: 3Com Corporation
    Inventors: Stephen A Williams, Andrew Knowles
  • Antenna assembly
    Patent number: 6329960
    Abstract: An antenna assembly comprises a printed circuit board having on one face various components and on the other face a ground plane, and a planar F suspended antenna comprising a conductive ground plane element having peripheral parts overlapping the edge of an aperture in the board a connecting element extending from the ground plane element through the aperture, a radiator element integral with the connecting element and extending generally parallel and within the area of the ground plane element, and an antenna feed element which extends from the radiating element though the aperture.
    Type: Grant
    Filed: September 7, 2000
    Date of Patent: December 11, 2001
    Assignee: 3Com Corporation
    Inventors: Rodger J Andrew, Stephen A Williams