Patents by Inventor Roy F. Dutton

Roy F. Dutton 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).

  • End-of-transmission keying device
    Patent number: 5212812
    Abstract: A device automatically re-keys a transmitter after a transmission ceases, and thereafter transmits a preselected audio signal. The device has a key-open sensor for sensing the end of a transmission and for initiating the audio signal. A keying circuit is controlled by the sensor to re-key the transmitter. An audio sensor senses the presence of the audio signal and controls the keying circuit to un-key the transmitter when the audio signal ceases.
    Type: Grant
    Filed: October 1, 1990
    Date of Patent: May 18, 1993
    Assignee: Mr. Jiggs CB Development, Inc.
    Inventor: Roy F. Dutton