Patents by Inventor Stuart W. Phelps

Stuart W. Phelps 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).

  • Automatic police emergency locator system
    Patent number: 4197497
    Abstract: All messages broadcast through a two-way radio by a police officer from his vehicle, are recorded on an endless tape loop of a playback recorder. An alerting signal generated by a pretuned oscillator is simultaneously recorded on the tape with each message. Playback operation of the recorder is initiated by a remote radio trigger device so as to replay and transmit the recorded message and altering signal through the vehicle radio for a timed duration.
    Type: Grant
    Filed: September 23, 1977
    Date of Patent: April 8, 1980
    Inventor: Stuart W. Phelps