Patents by Inventor Robert W. Pfeffer

Robert W. Pfeffer 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).

  • Resource-decoupled architecture for a telecommunications switching system
    Patent number: 4970721
    Abstract: The invention provides a telecommunications system exhibiting an architecture having a plurality of functional levels decoupled from one another by data transport systems. The communication facilities connected to the periphery of the system are terminated at the physical level only and the data is channelized for transmission through a channel switch to a first level of processing that provides channel services. The data is then multiplexed and transmitted to system and call processing resources via a frame transport system.
    Type: Grant
    Filed: January 16, 1990
    Date of Patent: November 13, 1990
    Assignee: Northern Telecom Limited
    Inventors: Andrew L. Aczel, Robert W. Pfeffer, Frank Mellor, Ernst A. Munter