Patents by Inventor Kazuhiro Shinojima

Kazuhiro Shinojima 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).

  • Rotor blades of turbomolecular pump
    Patent number: 5033936
    Abstract: In a turbomolecular pump, the blade angle of each of rotor blades relative to the plane of a rotor gradually decreases from its base toward its outer most periphery, and the opening ratio and relative blade interval of said rotor blades are made substantially constant from the base of the rotor blade to the outer most periphery of said rotor blade.
    Type: Grant
    Filed: August 23, 1989
    Date of Patent: July 23, 1991
    Assignee: Seiko Seiki Kabushiki Kaisha
    Inventor: Kazuhiro Shinojima