Patents by Inventor Edward Piper Walker

Edward Piper Walker 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).

  • Apparatus for indicating the sequence of alternating current signals
    Patent number: 4104586
    Abstract: An apparatus which indicates the sequence of a pair of alternating current input signals by determining the sense of a datum crossing in one input signal with respect to the polarity of the other input signal at the time of the datum crossing.
    Type: Grant
    Filed: November 22, 1976
    Date of Patent: August 1, 1978
    Assignee: The General Electric Company Limited
    Inventors: Adrian Orton Newbould, Edward Piper Walker, Anthony Williams