Patents by Inventor Minoru Mitani

Minoru Mitani 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).

  • Process for surface treatment of aluminum or aluminum alloy
    Patent number: 5132003
    Abstract: The present invention provides a process for surface treatment in which the surface of aluminium or its alloy can be put in a desired color and the improved wear resistance and corrosion resistance can be obtained. Anodic oxidation coatings obtained by conventional alumite treatment is porous and thus is small in wear resistance and in corrosion resistance and is insufficient in durability of coloring. The process of the present invention is characterized in that the process comprises the steps of: forming anodic oxidation coatings by conventional method on the surface of the aluminium or its alloy, thereafter applying an alternating voltage of 10 V.about.30 V within a sulfate solution or nitrate solution of a desired metal to a member on which said anodic oxidation coatings was formed by the above step, whereby said metal is electrolytically impregnated into said anodic oxidation coatings.
    Type: Grant
    Filed: October 24, 1990
    Date of Patent: July 21, 1992
    Inventor: Minoru Mitani
  • Screen-printing mask and method
    Patent number: 4324815
    Abstract: A method of forming a film or fine line which is very thick in comparison with its width, by repeated printings with heterogeneous or homogeneous printing pastes by using a screen-printing mask. A screen-printing mask having spacing means formed thereon for spacing the screen apart from the work surface.
    Type: Grant
    Filed: July 7, 1980
    Date of Patent: April 13, 1982
    Assignee: Mitani Electronics Industry Corp.
    Inventors: Minoru Mitani, Kiyoharu Hashimoto, Kenjiro Ninomiya, Tochikiyo Miyazaki, Otokuma Hashimoto, Hideki Mori
  • Screen-printing mask
    Patent number: 4242401
    Abstract: A method of forming a film or fine line which is very thick in comparison with its width, by repeated printings with heterogeneous or homogeneous printing pastes by using a screen-printing mask. A screen-printing mask having spacing means formed thereon for spacing the screen apart from the work surface.
    Type: Grant
    Filed: November 2, 1978
    Date of Patent: December 30, 1980
    Assignee: Mitani Electronics Industry Corp.
    Inventors: Minoru Mitani, Kiyoharu Hashimoto, Kenjiro Ninomiya, Toshikiyo Miyazaki, Otokuma Hashimoto, Hideki Mori
  • Flywheel for recording and or reproducing apparatus
    Patent number: 4086390
    Abstract: Disclosed is a flywheel assembly for recording and or reproducing devices which is produced by molding and sintering a mixture consisting principally of iron and graphite powders and, if necessary, a sulfur powder.
    Type: Grant
    Filed: September 17, 1976
    Date of Patent: April 25, 1978
    Assignee: Japan Powder Metallurgy Co., Ltd.
    Inventors: Seishu Mitani, Tsuneo Kudo, Minoru Mitani, Shuichi Saido