Patents by Inventor Frederick D. Porter

Frederick D. Porter 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).

  • Methods and apparatus for interfacing with application programs to manage multimedia multiparty communications
    Patent number: 5473680
    Abstract: A system connected to a network for controlling multiparty, multimedia calls having three components. The first component sends and receives multiparty, multimedia calls. The second component stores building blocks representing the multiparty, multimedia calls. The building blocks include objects, which correspond to different aspects of multiparty, multimedia calls, and relationships between the objects. The third component monitors the objects and their relationships, and notifies when changes occur in the objects or their relationships.
    Type: Grant
    Filed: June 14, 1994
    Date of Patent: December 5, 1995
    Assignee: Bell Communications Research, Inc.
    Inventor: Frederick D. Porter
  • DTDM multiplexing circuitry
    Patent number: 4833671
    Abstract: A multiplexer for multiplexing a plurality of relatively sparsely occupied DTDM bit streams into a single more densely occupied DTDM bit stream at the same bit rate is disclosed. The multiplexer comprises a plurality of line buffers for recognizing and queuing incoming DTDM frames and a central server unit for placing data from the incoming DTDM frames in the more densely occupied outgoing DTDM bit stream.
    Type: Grant
    Filed: November 10, 1987
    Date of Patent: May 23, 1989
    Assignee: Bell Communications Research, Inc.
    Inventors: Mark W. Beckner, Frederick D. Porter, Kuang-I Shu