Patents by Inventor David H. Gauger

David H. Gauger 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).

  • Acoustic transmitter and method to produce essentially longitudinal, acoustic waves
    Patent number: 4314365
    Abstract: A portable, electrohydraulic, acoustic transmitter releasably attaches to a solid medium such as a drill string to generate essentially longitudinal, acoustic signals in the medium. The signals are frequency modulated so that encoded messages may be transmitted between a surface and subsurface location to activate downhole equipment.
    Type: Grant
    Filed: January 21, 1980
    Date of Patent: February 2, 1982
    Assignees: Exxon Production Research Company, Motorola, Inc.
    Inventors: Clifford W. Petersen, John M. Bednar, Edwin J. Hocker, Jr., David H. Gauger, James M. Henderson