Patents by Inventor Tsutomu Toyohara

Tsutomu Toyohara 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).

  • Apparatus for working peripheral wall of hemispherical shell
    Patent number: 4690020
    Abstract: This invention relates to a method of forming a spherical surface of a hemispherical shell having projections on its inner and outer surfaces and an apparatus for working the hemispherical shell, which are particularly suitably applied to a large-scale spherical pressure resisting shell for forming a control chamber in an abyssal diving research vessel.
    Type: Grant
    Filed: July 2, 1986
    Date of Patent: September 1, 1987
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Ryoichiro Sasano, Tsutomu Toyohara, Toshimichi Takigawa
  • Method and apparatus for working peripheral wall of hemispherical shell
    Patent number: 4617845
    Abstract: This invention relates to a method of forming a spherical surface of a hemispherical shell having projections on its inner and outer surfaces and an apparatus for working the hemispherical shell, which are particularly suitably applied to a large-scale spherical pressure resisting shell for forming a control chamber in an abyssal diving research vessel.
    Type: Grant
    Filed: March 26, 1984
    Date of Patent: October 21, 1986
    Assignee: Mitsubishi Jukogio Kabushiki Kaisha
    Inventors: Ryoichiro Sasano, Tsutomu Toyohara, Toshimichi Takigawa