Patents by Inventor Macdonald J. Wiggins

Macdonald J. Wiggins 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).

  • Pulse position modulation secret communication system
    Patent number: 4152545
    Abstract: This invention relates to method and apparatus in accordance with which a PPM signal can be encrypted with minimum complexity, involving converting the PPM signal to an encrypted PCM signal, and converting the encrypted PCM signal to a corresponding PPM signal. Only a receiver with a decrypter employing the same modifying code may convert the encrypted PPM to the original PPM intelligence signal.
    Type: Grant
    Filed: April 5, 1965
    Date of Patent: May 1, 1979
    Assignee: Martin Marietta Corporation
    Inventors: Roy E. Gilbreath, Jr., Macdonald J. Wiggins, Kampbell T. Larson