Patents by Inventor Hidekatsu Fujii

Hidekatsu Fujii 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).

  • Focusing screen mounting device in a camera
    Patent number: 4693577
    Abstract: A focusing screen is inserted from a mirror box side and mounted below a pentaprism. A keeper member formed by bending a linear spring member into the shape of a frame is provided for the positioning of the focusing screen, an engaging pawl for engaging the intermediate portion of the keeper member is provided on a fixed portion near the opening of a lens mount, the opposite end portions of the keeper member opposed to the intermediate portion are rotatably supported on a fixed portion opposite to the lens mount, and the focusing screen is designed to be released from a focusing screen containing chamber along the keeper member when the keeper member is disengaged from the engaging pawl and rotated.
    Type: Grant
    Filed: February 21, 1986
    Date of Patent: September 15, 1987
    Assignee: Nippon Kogaku K.K.
    Inventors: Nobuaki Sasagaki, Hidekatsu Fujii