Patents by Inventor Stephen Whynot

Stephen Whynot 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).

  • DTMF digit collection and transportation for a packet network
    Patent number: 6771641
    Abstract: A system and method is provided for collecting and transporting DTMF digits between two network end points in a packet network in order to preserve the integrity of the DTMF digits. The system and method use a Session Initiation Protocol (SIP), which is currently defined by the standard body of Internet Engineering Task Force. SIP applications utilize certain predetermined messages, such as an INFO message, and templates. DTMF digits can be collected and transported by using the SIP INFO messages. This works especially well for telephony applications which may require mid session signaling.
    Type: Grant
    Filed: December 10, 1999
    Date of Patent: August 3, 2004
    Assignee: Nortel Networks Limited
    Inventors: Patrick Sollee, Tahsin Choudhuri, Christopher Haun, Scott L. Orton, Stephen Whynot