Patents by Inventor Marty Callahan

Marty Callahan 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).

  • Communications apparatus for use with cable television systems
    Patent number: 4575750
    Abstract: A cable television system communications apparatus comprising a transmission unit for originating various messages and message class identification signals and a receiver unit for receiving such signals and for rendering audible such messages as are authorized for that particular receiver unit.
    Type: Grant
    Filed: May 31, 1984
    Date of Patent: March 11, 1986
    Inventor: Marty Callahan