Patents by Inventor Mitchell D. Coffin

Mitchell D. Coffin 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).

  • Establishing call sessions between terminals through plural switch systems
    Patent number: 6958980
    Abstract: A communications system includes a first switch and a second switch coupled to a packet-based network. A first set of network terminals are coupled to the first switch, and a second set of network terminals are coupled to the second switch. Each of the terminals is associated with a virtual terminal number (VTN). Each of the first and second switches store profile information associated with VTNs of the terminals. The profile information relate to the capabilities or features of the network terminals. The switches communicate signaling over a packet-based trunk, or virtual trunk, that is established on the packet-based network. Each switch sends messages to their associated terminals to establish media paths over the packet-based network to establish a call session.
    Type: Grant
    Filed: December 20, 2000
    Date of Patent: October 25, 2005
    Assignee: Nortel Networks Limited
    Inventors: Peter G. Tarle, Mitchell D. Coffin, Mark Y. Bissell, Adel E. Mostafa, Francois Audet
  • Establishing call sessions between terminals through plural switch systems
    Publication number: 20020075849
    Abstract: A communications system includes a first switch and a second switch coupled to a packet-based network. A first set of network terminals are coupled to the first switch, and a second set of network terminals are coupled to the second switch. Each of the terminals is associated with a virtual terminal number (VTN). Each of the first and second switches store profile information associated with VTNs of the terminals. The profile information relate to the capabilities or features of the network terminals. The switches communicate signaling over a packet-based trunk, or virtual trunk, that is established on the packet-based network. Each switch sends messages to their associated terminals to establish media paths over the packet-based network to establish a call session.
    Type: Application
    Filed: December 20, 2000
    Publication date: June 20, 2002
    Inventors: Peter G. Tarle, Mitchell D. Coffin, Mark Y. Bissell, Adel E. Mostafa, Francois Audet