Patents by Inventor Robert D. Greaby

Robert D. Greaby 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).

  • Bidirectional amplifier
    Patent number: 4758822
    Abstract: A bidirectional amplifier for use in a transmission line, that utilizes a pair of interconnected bridge circuits including isolation transformers and a pair of unidirectional amplifiers. The transmission in each direction uses a single amplifier to amplify the signal for a particular direction of transmission without effecting the other amplifier.
    Type: Grant
    Filed: April 30, 1986
    Date of Patent: July 19, 1988
    Assignee: GTE Communication Systems Corporation
    Inventors: Robert D. Greaby, Hugh S. Montgomery