Patents by Inventor Makoto Katsuma

Makoto Katsuma 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 interchanging device in single lens reflex camera
    Patent number: 4346973
    Abstract: In a single lens reflex camera a focusing screen is removably attached with a focusing screen fitting member unitarily formed therewith for fitting the focusing screen in the camera body with a spring being provided therebetween to form a focusing screen unit. The focusing screen fitting member is provided with a clamp holder portion for engagement with an interchanging tool for use in attaching and detaching the focusing screen unit to and from the camera body, whereby the interchanging operation of the focusing screen may be performed with ease and safety.
    Type: Grant
    Filed: January 30, 1981
    Date of Patent: August 31, 1982
    Assignee: Canon Kabushiki Kaisha
    Inventors: Makoto Katsuma, Masayuki Suzuki, Kenichi Shinbori, Hiroyasu Murakami