Patents by Inventor Bellie M. Spencer

Bellie M. Spencer 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).

  • Code lengthening system
    Patent number: 4809295
    Abstract: Apparatus and a method of generating very very long pseudonoise (PN) spread spectrum codes is provided where the code is so long that it need never repeat itself during actual use. The transmitter is adapted to start to transmit one set of a plurality of component codes as a composite code having correlation properties with the component codes. When the first set of component codes are acquired at the receiver the composite code is then transmitted as a component of a different composite code which contains the previous composite code and a second new set of component codes which have correlation properties with the new set of component codes. When the second set of component codes are acquired by the receiver the composite code is then transmitted as a third new and different composite code which contains a third new set of component codes which have correlation properties with third new set of component codes.
    Type: Grant
    Filed: April 20, 1987
    Date of Patent: February 28, 1989
    Assignee: Unisys Corporation
    Inventors: John W. Zscheile, Jr., Alan E. Lundquist, Bellie M. Spencer