Patents by Inventor Wallace D. Westfall

Wallace D. Westfall 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).

  • Transmitter location system for frequencies below HF
    Patent number: 5073784
    Abstract: Differential phase measurement techniques and apparatus for accurately loing unknown transmitters over great distances at radio frequencies below HF. A network of separated, time- and phase-synchronized, pairs of receiving stations having vertical whip antennas and having a known base-line geometry with respect to each other are used to accurately measure VLF phase differentials. The measured phase differences are compared against theoretical calculated values to provide highly accurate transmitter location information.
    Type: Grant
    Filed: April 26, 1972
    Date of Patent: December 17, 1991
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Wallace D. Westfall