Patents by Inventor Fumio Oshima

Fumio Oshima 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).

  • Rear aperture converter
    Patent number: 4372663
    Abstract: A photographic camera has an interchangeable lens assembly with a lens mount and a camera body with a body mount engageable with the lens mount, a source of binary signals with at least two bits representative of the minimum aperture value in the lens assembly, and a mechanism in the camera body for receiving the binary information. A rear aperture converter has a first mount engageable with the lens mount and a second mount engageable with the body mount. One bit of the binary information is transmitted from the first mount to the second mount without change. The other bit of the binary information is transmitted from the first mount to the second mount in inverted form.
    Type: Grant
    Filed: July 23, 1981
    Date of Patent: February 8, 1983
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventor: Fumio Oshima