Patents by Inventor David F. Griffiths

David F. Griffiths 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).

  • Telephone apparatus
    Patent number: 4149041
    Abstract: A telephone control console including visual indicator means, data input means, audio frequency input and output means, microprocessor means, data transmission and reception means wherein said microprocessor means controls at least some of said visual indicator means in accordance with data received by said data reception means and in accordance with data input through said data input means and also controls the transmission of data by said data transmission means in accordance with instructions from said data input means and wherein said audio frequency input and output means include an input and output for an operator's telephone.
    Type: Grant
    Filed: September 13, 1977
    Date of Patent: April 10, 1979
    Assignee: The Post Office
    Inventors: Stuart E. Card, David F. Griffiths