Patents by Inventor Robert Denman

Robert Denman 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).

  • Push-to-talk telecommunications system utilizing a voice-over-IP network
    Patent number: 8447341
    Abstract: A method and system to provide push-to-talk from one user to another in a wireless packet data telecommunications network is described. The system may include: a wireless communication network including push-to-talk (PTT) functionality, with a Session Initiation Protocol (SIP) Proxy Server; a SIP Registrar and Location Server operable to store contact addresses of active mobile devices; a Realtime Transport Protocol (RTP) Media Gateway (PTT Server) operable to function as a call endpoint for each of a plurality of mobile devices wherein the plurality of mobile devices are segmented into membership groups, the PTT Server further operable to multicast a communication from one member of the group to the other members of the group; and an Internet Protocol (IP) network interconnecting the SIP Proxy server, the SIP Registrar and Location Server, and the PTT Server.
    Type: Grant
    Filed: June 9, 2010
    Date of Patent: May 21, 2013
    Assignee: Apple Inc.
    Inventors: Robert Denman, Sriram Parameswar, Barbara Derryberry
  • PUSH-TO-TALK TELECOMMUNICATIONS SYSTEM UTILIZING A VOICE-OVER-IP NETWORK
    Publication number: 20100248772
    Abstract: A method and system to provide push-to-talk from one user to another in a wireless packet data telecommunications network is described. The system may include: a wireless communication network including push-to-talk (PTT) functionality, with a Session Initiation Protocol (SIP) Proxy Server; a SIP Registrar and Location Server operable to store contact addresses of active mobile devices; a Realtime Transport Protocol (RTP) Media Gateway (PTT Server) operable to function as a call endpoint for each of a plurality of mobile devices wherein the plurality of mobile devices are segmented into membership groups, the PTT Server further operable to multicast a communication from one member of the group to the other members of the group; and an Internet Protocol (IP) network interconnecting the SIP Proxy server, the SIP Registrar and Location Server, and the PTT Server.
    Type: Application
    Filed: June 9, 2010
    Publication date: September 30, 2010
    Applicant: NORTEL NETWORKS LIMITED
    Inventors: Robert Denman, Sriram Parameswar, Barbara Derryberry