Patents by Inventor Keiichi Washizuka

Keiichi Washizuka 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).

  • Arithmetic operation control machine for electronic computers
    Patent number: D285923
    Type: Grant
    Filed: March 7, 1984
    Date of Patent: September 30, 1986
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventors: Tsuneo Takahashi, Takaharu Andoh, Keiichi Washizuka
  • Electric vacuum cleaner
    Patent number: D288972
    Type: Grant
    Filed: June 18, 1984
    Date of Patent: March 24, 1987
    Assignees: Kabushiki Kaisha Toshiba, Tokyo Electric Co., Ltd.
    Inventors: Kyouichi Morioka, Tsuneo Takahashi, Takaharu Andoh, Keiichi Washizuka
  • Electric vacuum cleaner
    Patent number: D289097
    Type: Grant
    Filed: June 18, 1984
    Date of Patent: March 31, 1987
    Assignees: Kabushiki Kaisha Toshiba, Tokyo Electric Co., Ltd.
    Inventors: Tsuneo Takahashi, Takaharu Andoh, Kyouichi Morioka, Keiichi Washizuka
  • Label printer
    Patent number: D373784
    Type: Grant
    Filed: May 2, 1995
    Date of Patent: September 17, 1996
    Assignee: Kabushiki Kaisha Tec
    Inventors: Keiichi Washizuka, Osamu Mimoto