Patents by Inventor David W. J. Holmes

David W. J. Holmes 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).

  • Audio teleconferencing
    Patent number: 4456789
    Abstract: A control unit for controlling operation of a plurality of audio teleconference terminals comprises a plurality of inputs which are connected each to a particular terminal. A speech detector detects from which terminals speech signals are received and actuates switching means to connect those terminals in open loop teleconference.
    Type: Grant
    Filed: March 5, 1979
    Date of Patent: June 26, 1984
    Assignee: The Post Office
    Inventors: Ian S. Groves, David R. Guard, John G. Bunting, Christopher E. Rowlands, Edwin J. Powter, David W. J. Holmes, Graham J. Trott