Patents by Inventor James A. Mellenger

James A. Mellenger 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).

  • Asynchronous quadriphase communications system and method
    Patent number: 3931472
    Abstract: A communications system and method for transmitting and receiving two independently timed (asynchronous) binary data signals on a quadriphase carrier. The four phase ambiguity ordinarily resulting from quadriphase transmission and reception is overcome by uniquely identifying one input channel, for example, by slightly increasing the clock rate of the channel. In reception each channel is demodulated and the data rate of each channel is examined to identify the increased clock rate channel. That channel is then returned to its original clock rate.
    Type: Grant
    Filed: May 7, 1974
    Date of Patent: January 6, 1976
    Assignee: Avantek, Inc.
    Inventors: Walter J. Gill, James A. Mellenger