Patents by Inventor Yumiko Inuzuka

Yumiko Inuzuka 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).

  • Viewfinder optical system and optical apparatus having the same
    Patent number: 6166859
    Abstract: A viewfinder optical system for conducting light from an object to an observer includes a plurality of reflecting surfaces having optical powers. Optical paths of each ray of a light flux reflected successively by the plurality of reflecting surfaces intersect each other at least twice, and the light from the object forms an image at least twice when passing through the viewfinder optical system.
    Type: Grant
    Filed: August 3, 1999
    Date of Patent: December 26, 2000
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yumiko Inuzuka, Hiroshi Saito