Patents by Inventor Gregory Robert Utas

Gregory Robert Utas 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).

  • Method and apparatus for interworking between internet protocol (IP) telephony protocols
    Patent number: 6885658
    Abstract: A method and an apparatus for interworking between internet protocol (IP) telephony protocols includes a call server. The call server includes a first protocol agent for communicating with a first protocol device according to a first protocol. A second protocol agent communicates with a second protocol device according to a second protocol. An interworking agent provides functions usable by the first and second protocol agents to communicate with each other according to a third protocol. The third protocol is a superset of functions provided by the first and second protocols.
    Type: Grant
    Filed: February 18, 2000
    Date of Patent: April 26, 2005
    Assignee: Nortel Networks Limited
    Inventors: David P. Ress, Xuewen Li, Denise J. Ingram, Gregory Robert Utas