Patents by Inventor Katsuyo Kakuta

Katsuyo Kakuta 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).

  • Dual spark plug ignition engine
    Patent number: 4144860
    Abstract: The air-fuel mixture in each combustion chamber of a dual spark plug ignition engine is ignited with two spark plugs during normal engine operation, but is ignited with only one of the two spark plugs during high power output engine operation. The spark timing in the ignition with one spark plug is advanced relative to that in the ignition with two spark plugs.
    Type: Grant
    Filed: April 13, 1977
    Date of Patent: March 20, 1979
    Assignee: Nissan Motor Company, Limited
    Inventors: Shigeo Muranaka, Yasuo Takagi, Yasushi Araki, Katsuyo Kakuta