Patents by Inventor Shigemasa Sayo

Shigemasa Sayo 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).

  • Exhaust gas purification device
    Patent number: 4188783
    Abstract: The exhaust gas purification device includes an exhaust manifold, a purification cylinder connected with the exhaust manifold through a first honey-comb shaped catalyst, and a second honey-comb shaped catalyst positioned at the rear portion of the purification cylinder. Each catalyst is supported by steel wool rings including coarse and dense portions of steel wool. The purification device further includes a secondary air supplying arrangement.
    Type: Grant
    Filed: August 10, 1977
    Date of Patent: February 19, 1980
    Assignee: Suzuki Jidosha Kogyo Kabushiki Kaisha
    Inventors: Shigemasa Sayo, Yasuyuki Sugiura, Katutoshi Ueda, Hirohiko Fujiwara, Toshikatsu Hibi