Patents by Inventor Stefan Hillenmayer

Stefan Hillenmayer 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).

  • Telephone station
    Patent number: D345358
    Type: Grant
    Filed: October 20, 1992
    Date of Patent: March 22, 1994
    Assignee: Siemens Aktiengesellschaft
    Inventors: Stefan Hillenmayer, Wolfgang Muenscher
  • Telephone station with an auxiliary unit
    Patent number: D345558
    Type: Grant
    Filed: October 20, 1992
    Date of Patent: March 29, 1994
    Assignee: Siemens Aktiengesellschaft
    Inventors: Stefan Hillenmayer, Wolfgang Muenscher
  • Telephone station
    Patent number: D351165
    Type: Grant
    Filed: May 7, 1993
    Date of Patent: October 4, 1994
    Assignee: Siemens Aktiengesellschaft
    Inventor: Stefan Hillenmayer
  • Telephone station
    Patent number: D357915
    Type: Grant
    Filed: May 7, 1993
    Date of Patent: May 2, 1995
    Assignee: Siemens Aktiengesellschaft
    Inventor: Stefan Hillenmayer