Patents by Inventor Hiromune Chuma

Hiromune Chuma 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).

  • Method for producing aluminum drums having highly smooth surface
    Patent number: 4805435
    Abstract: A method for producing aluminum drums having highly smooth surfaces, the method including two steps; the preparation of an aluminum pipe by extrusion, and the drawing of the pipe through a die unit, wherein the die unit comprises a die and a plug, the die having an approach angle of 45.degree. to 75.degree. C. and the plug having an approach angle of 10.degree. to 20.degree..
    Type: Grant
    Filed: January 27, 1988
    Date of Patent: February 21, 1989
    Assignee: Showa Aluminum Kabushiki Kaisha
    Inventors: Minobu Sukimoto, Hiromune Chuma, Teruo Tachi