Patents by Inventor Katsuhiko Shibukawa

Katsuhiko Shibukawa 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).

  • Electromagnetic diaphragm pump
    Patent number: D470864
    Type: Grant
    Filed: December 11, 2001
    Date of Patent: February 25, 2003
    Assignee: Nitto Kohki Co., Ltd.
    Inventors: Katsuhiko Shibukawa, Atsuki Hashimoto
  • Pump
    Patent number: D590421
    Type: Grant
    Filed: August 25, 2008
    Date of Patent: April 14, 2009
    Assignee: Nito Kohki Co., Ltd.
    Inventor: Katsuhiko Shibukawa
  • Pump
    Patent number: D946626
    Type: Grant
    Filed: June 17, 2020
    Date of Patent: March 22, 2022
    Assignee: NITTO KOHKI CO., LTD.
    Inventors: Katsuhiko Shibukawa, Hiroto Sakurai, Hiroshi Nishitsuji, Kazushige Nishi