Patents by Inventor Takaharu Gotoh

Takaharu Gotoh 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).

  • Piston ring assembly for automotive internal combustion engine
    Patent number: 4475739
    Abstract: Disclosed is a piston ring assembly for an automotive internal combustion engine, including a first compression ring having double-stepped mating ends for reducing the quantity of blow-by gas, and a second compression ring which is constructed in the form of a double-ring structure adapted for reducing the quantity of oil consumption.
    Type: Grant
    Filed: April 29, 1983
    Date of Patent: October 9, 1984
    Assignee: Nissan Motor Company, Limited
    Inventors: Yasuo Nakajima, Shinichi Nagumo, Yoshifumi Hase, Takaharu Gotoh