Patents by Inventor Toshiaki Shirakawa

Toshiaki Shirakawa 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).

  • Free access type floor
    Patent number: 4736555
    Abstract: A free access type floor comprising a plurality of floor boards arranged on one and the same plane in a closely connected manner to form a secondary floor, engaging members provided at at least each corner of each of said floor boards, and support members provided with floor board-engaging means, which are adjustable in height, for detachably engaging with said adjacent engaging members of adjacent floor boards on one and the same plane to support said floor boards in a closely connected manner, and a method for installing the same.
    Type: Grant
    Filed: May 20, 1986
    Date of Patent: April 12, 1988
    Assignee: Sekisui Kagaku Kogyo Kabushiki Kaisha
    Inventors: Shouzi Nagare, Fuziaki Yamakawa, Akio Ishimoto, Yasuo Inukai, Tadahiro Sugamura, Soutarou Takino, Toshiaki Shirakawa