Patents by Inventor Katsuhiro Tagawa

Katsuhiro Tagawa 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).

  • Fuel tank pressure-vacuum relief valve
    Patent number: 4040404
    Abstract: Two check valves are connected between a fuel tank and a carbon canister to relieve excessive pressure or vacuum in the fuel tank.
    Type: Grant
    Filed: January 19, 1976
    Date of Patent: August 9, 1977
    Assignee: Nisson Motor Company, Limited
    Inventor: Katsuhiro Tagawa