Patents by Inventor Zenzaburo Yoshino

Zenzaburo Yoshino 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).

  • View finder for a single lens reflex camera
    Patent number: 3975750
    Abstract: A first focusing optical system including a mirror is located behind the taking lens of a single lens reflex camera for reflecting the light coming through the taking lens at an angle with respect to the optical axis thereof and forming an inverted real image of an object to be photographed on the first focal plane in reduced scale. A second focusing optical system is provided behind the first focal plane to form an erected real image of the object on a second focal plane. The erected real image is viewed through an eyepiece as a virtual image in enlarged scale. In an embodiment of the invention, a concave mirror is used as the first focusing optical system. In a preferred embodiment of the invention, the first focusing optical system behind the taking lens is moved into and out of the optical axis of the taking lens in response to operations of the camera.
    Type: Grant
    Filed: August 16, 1974
    Date of Patent: August 17, 1976
    Assignee: Zenza Bronica Industries, Inc.
    Inventors: Zenzaburo Yoshino, Yoshikazu Ando, Junichi Yokozato
  • Grip for a photographic camera
    Patent number: D246372
    Type: Grant
    Filed: September 8, 1976
    Date of Patent: November 15, 1977
    Inventor: Zenzaburo Yoshino
  • Single lens reflex camera
    Patent number: D246460
    Type: Grant
    Filed: September 8, 1976
    Date of Patent: November 22, 1977
    Inventor: Zenzaburo Yoshino