Patents by Inventor Takashi Dougahara

Takashi Dougahara 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).

  • Engine exhaust emission control system
    Patent number: 5398503
    Abstract: An engine exhaust emission control system, in which a valve is set at a hydrocarbon adsorbing position to guide exhaust emissions to a bypass line including an adsorbent sieve for adsorbing hydrocarbons during a initial period of engine start-up, and the valve is switched over to a hydrocarbon purging position to guide exhaust emissions to an exhaust line and to divert a part of the exhaust emissions to the bypass line.
    Type: Grant
    Filed: August 20, 1993
    Date of Patent: March 21, 1995
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventors: Yoshiaki Danno, Kazuo Koga, Takashi Dougahara