Patents by Inventor J. Graham Hartwell

J. Graham Hartwell 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).

  • Software switch for digitized audio signals
    Patent number: 5125023
    Abstract: A method and apparatus are described for permitting conferencing in an automatic telephone information system by utilizing shared circular memory buffers incorporated in voice processing boards inserted in expansion slots in a PC to transfer speech from one line to another in a timed sequence controlled by the PC.
    Type: Grant
    Filed: July 31, 1990
    Date of Patent: June 23, 1992
    Assignee: Microlog Corporation
    Inventors: Georg E. Morduch, J. Graham Hartwell, Joe J. Lynn