Patents by Inventor Akira Akashi

Akira Akashi 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).

  • Interchangeable lens barrel with signal transfer contacts
    Patent number: 4448509
    Abstract: An interchangeable lens barrel includes connection terminals on a part of the lens barrel for sending and receiving electrical signals to and from a photographic apparatus. The lens barrel part is provided with a mechanism for protecting the connection terminals by covering the terminals when the lens barrel is removed from the photographic apparatus. When the lens barrel is mounted on the photographic apparatus, the protecting mechanism is retracted from the terminals to allow for connection with corresponding terminals on the photographic apparatus.
    Type: Grant
    Filed: September 9, 1982
    Date of Patent: May 15, 1984
    Assignee: Canon Kabushiki Kaisha
    Inventors: Makoto Katsuma, Shigeru Kamata, Syuichiro Saito, Masaharu Kawamura, Akira Akashi
  • Safety device for camera and accessory
    Patent number: 4437752
    Abstract: The disclosed safety device electrically senses the conductivity between the electrical contacts of a camera and an accessory attached thereto, and, upon detection of a failure in conductivity, produces a warning signal for the user.
    Type: Grant
    Filed: November 29, 1982
    Date of Patent: March 20, 1984
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akira Akashi, Makoto Katsuma, Masaharu Kawamura, Shigeru Kamata, Syuichiro Saito