Patents by Inventor Hans Åke Lindgren

Hans Åke Lindgren 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).

  • Telecommunications system
    Patent number: 6775534
    Abstract: There is described a system which, in a voice over IP radiotelecommunications system, allows a mobile station to make an emergency call, even though other calls would not be allowed at that time. The mobile station includes an emergency call indication in the session activation request, and this is recognized by the network nodes, which then allow call set up.
    Type: Grant
    Filed: April 13, 2001
    Date of Patent: August 10, 2004
    Assignee: Telefonaktiebolaget LM Ericsson
    Inventors: Hans Åke Lindgren, Mats Ola Stille