Patents by Inventor Katsutoshi Betsuki

Katsutoshi Betsuki 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).

  • Artificial joint
    Patent number: 4685919
    Abstract: An artificial joint for joining two bones comprises first and second members each including a shank portion for attachment to one of the bones and a mating member adapted to contact the mating member of the other member to enable smooth rotation through a predetermined angle in only two directions.
    Type: Grant
    Filed: March 14, 1986
    Date of Patent: August 11, 1987
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Shigeo Niwa, Kazuo Kondo, Katsutoshi Betsuki