Patents by Inventor Koshi Takeuchi

Koshi Takeuchi 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).

  • Holding device for a lens of an interchangeable lens assembly
    Patent number: 4226505
    Abstract: A diaphragm linkage device for interchangeable lenses wherein more than three column-shaped guide members with a groove consisting of plastic material with a small friction coefficient are provided around the optical axis of the barrel for the interchangeable lens. A diaphragm linkage ring is adapted in the grooves in such a manner that by means of the guide members the diaphragm linkage ring is carried in the direction of thrust and in the radial direction.
    Type: Grant
    Filed: September 6, 1978
    Date of Patent: October 7, 1980
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shigeru Hashimoto, Akira Masuda, Katura Mochizuki, Akira Satoh, Koshi Takeuchi, Teruhisa Oda
  • Diaphragm linkage device for interchangeable lens
    Patent number: 4152064
    Abstract: A diaphragm linkage device for interchangeable lenses wherein more than three column-shaped guide members with a groove consisting of plastic material with a small friction coefficient are provided around the optical axis of the barrel for the interchangeable lens. A diaphragm linkage ring is adapted in the grooves in such a manner that by means of the guide members the diaphragm linkage ring is carried in the direction of thrust and in the radial direction.
    Type: Grant
    Filed: September 13, 1976
    Date of Patent: May 1, 1979
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shigeru Hashimoto, Akira Masuda, Katura Mochizuki, Akira Satoh, Koshi Takeuchi, Teruhisa Oda