Patents by Inventor Sven Birkenheuer

Sven Birkenheuer 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).

  • Table
    Patent number: D508625
    Type: Grant
    Filed: April 2, 2004
    Date of Patent: August 23, 2005
    Assignee: Kokuyo Co., Ltd.
    Inventors: Fritz Frenkler, Sven Birkenheuer, Hisashi Ejima
  • Table
    Patent number: D512587
    Type: Grant
    Filed: February 7, 2005
    Date of Patent: December 13, 2005
    Assignee: Kokuyo Co., Ltd.
    Inventors: Fritz Frenkler, Sven Birkenheuer, Hisashi Ejima
  • Chair
    Patent number: D519294
    Type: Grant
    Filed: April 2, 2004
    Date of Patent: April 25, 2006
    Assignee: Kokuyo Co., Ltd.
    Inventors: Fritz Frenkler, Sven Birkenheuer, Yoko Iida