Patents by Inventor Sizuo Ishii

Sizuo Ishii 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).

  • Automatic film feeding apparatus for photographic camera
    Patent number: 4297019
    Abstract: An automatic film feeding apparatus for a camera includes a first switch operable in response to the opened or closed position of the camera rear cover, a second switch operable in response to the position of a film counter, a third switch operable in accordance with the position of a film strip in a camera, and an electronic control circuit for operating a film winding motor drive mechanism in response to predetermined states of the first, second, and third switches.
    Type: Grant
    Filed: August 14, 1979
    Date of Patent: October 27, 1981
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Michio Yagi, Kunio Nakajima, Yasutsugu Nakagawa, Sizuo Ishii, Kazuhisa Aratame