Patents by Inventor Philip M. Garratt

Philip M. Garratt 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).

  • Noise-immune carrier current actuated control
    Patent number: 4091361
    Abstract: A redundant digital address and function code, received through an a.c. power distribution circuit, is decoded in a carrier current receiver to perform a predetermined control function. A high degree of immunity to spurious signals is achieved by delaying performance of the function until the correct address portion of the transmitted word has been received at least two times out of three. This increases the likelihood that only the intended function will be performed at only the intended address.
    Type: Grant
    Filed: December 9, 1976
    Date of Patent: May 23, 1978
    Assignee: General Electric Company
    Inventors: Charles W. Eichelberger, Philip M. Garratt