Patents by Inventor Jorg Littmann

Jorg Littmann 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).

  • Network entity for interconnecting SIP end-points of different capabilities
    Patent number: 7554927
    Abstract: There is described a Session Initiation Protocol (SIP) network entity for operating in a communications channel between a first SIP end point and a second SIP end point in a communication network. The first SIP end point has available a first set of communication features and the second SIP end point has available a second set of communication features, including at least one communication feature, for example Music on Hold, that is unavailable to the first SIP end point. The network entity acts as a client application for the first SIP end point and as a server application for the second SIP end point and is arranged to exchange signaling information with the SIP end points to enable the second SIP end point to utilize the at least one communication feature during communications with the first SIP end point.
    Type: Grant
    Filed: September 7, 2004
    Date of Patent: June 30, 2009
    Assignee: Siemes Aktiengesellschaft
    Inventors: Thomas Hanna, Klaus-Josef Kunte, Jörg Littmann, Ingolf Thiele
  • Network entity for interconnecting sip end-points of different capabilities
    Publication number: 20070083658
    Abstract: There is described a Session Initiation Protocol (SIP) network entity for operating in a communications channel between a first SIP end point and a second SIP end point in a communication network. The first SIP end point has available a first set of communication features and the second SIP end point has available a second set of communication features, including at least one communication feature, for example Music on Hold, that is unavailable to the first SIP end point. The network entity comprises means for acting as a client application for the first SIP end point and as a server application for the second SIP end point and is arranged to exchange signaling information with the SIP end points to enable the second SIP end point to utilize the at least one communication feature during communications with the first SIP end point.
    Type: Application
    Filed: September 7, 2004
    Publication date: April 12, 2007
    Inventors: Thomas Hanna, Klaus-Josef Kunte, Jorg Littmann, Ingolf Thiele