Patents by Inventor Atuyoshi Tamura

Atuyoshi Tamura 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).

  • Filament for brushmaking
    Patent number: 4559268
    Abstract: A filament for brushmaking which is excellent in yield and in bend recovery, and when used in making paintbrushes, can give brushes with good paintability.A filament has a specified cross section having a plurality of cavity of hollow structures, the hollow ratio being 20 to 60% based on the whole cross-sectional area, capable of affording greater yield, ready processability at its end, excellent stiffness and excellent cleanability.
    Type: Grant
    Filed: July 2, 1984
    Date of Patent: December 17, 1985
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Hiroyuki Nakashima, Atuyoshi Tamura, Yoichi Kanbara, Masaharu Fujii