Patents by Inventor Atuo Okumura

Atuo Okumura 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).

  • Shift control unit of automatic transmission
    Patent number: 6074325
    Abstract: A shift control unit which improves the shift feeling of an automatic transmission includes an operation control device for placing a frictional engaging element in a slow drain state during a timing time decided by a timing time deciding device and in a quick drain state when the timing time has elapsed.
    Type: Grant
    Filed: January 6, 1999
    Date of Patent: June 13, 2000
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Yoshiyuki Onimaru, Masato Shimei, Takanao Suzuki, Yasuo Shirai, Atuo Okumura, Takahiro Sakai