Patents by Inventor Masahiro Hyakawa

Masahiro Hyakawa 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).

  • Water-sealed camera
    Patent number: 5077567
    Abstract: In a water-sealed camera arranged to be watertight except a portion at which a movable lens barrel is located, the water-sealed camera is further arranged to detachably mount a waterproofing lens cover for watertightly covering the movable lens barrel. Thus, the camera can be arranged to be completely watertight irrespective of the presence of the movable lens barrel.
    Type: Grant
    Filed: August 20, 1990
    Date of Patent: December 31, 1991
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventors: Keisuke Haraguchi, Masahiro Hyakawa