Patents by Inventor Robert J. Yannes

Robert J. Yannes 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).

  • Sound interface circuit
    Patent number: 4677890
    Abstract: A sound interface circuit is implemented in large scale integrated circuitry (LSI) on a single chip to provide 3 voice electronic music synthesizer/sound effects, and is compatible with instructions from commercially available microprocessors; whereof a wide range, high-resolution control of pitch (frequency) tone color (harmonic content) and dynamics (volume) is achieved and specialized control circuitry minimizes software overhead, facilitating use in arcade/home video games and low cost musical instruments.
    Type: Grant
    Filed: February 27, 1983
    Date of Patent: July 7, 1987
    Assignee: Commodore Business Machines Inc.
    Inventor: Robert J. Yannes