Patents by Inventor Craig P. Schaffter

Craig P. Schaffter 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).

  • Integrated telephone transmission and switching system
    Patent number: 4288870
    Abstract: An integrated telephone transmission and switching system operating in a multiframe format where each frame consists of a plurality of time slots and includes a base switch connected to a plurality of multitime slots data buses where the base switch operates to switch encoded data between any specified time slots on any of the buses. A subscriber switch is connected between a plurality of subscriber lines and to a pair of multitime-slot data buses and operates to connect and concentrate the local subscriber lines to the specified time slots on the pair of data buses, thereby enabling connections between a local subscriber line and any other subscriber line connected to the system.
    Type: Grant
    Filed: February 2, 1978
    Date of Patent: September 8, 1981
    Assignee: TRW, Inc.
    Inventors: John C. McDonald, James R. Baichtal, Bradley A. Helliwell, Alexander C. Ling, Craig P. Schaffter