Patents by Inventor Norio Nakabayashi

Norio Nakabayashi 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).

  • Focusing screen of a camera
    Patent number: 4519686
    Abstract: A focusing screen capable of transmitting light therethrough and disposed between an objective lens and an eye-piece includes a surface formed with a large number of substantially hemispherical faces of irregular sizes disposed irregularly. The radius of curvature of the hemispherical faces is within the range of 8.5 to 52.8 .mu.m and the height thereof is within the range of 1.5 to 3.6 .mu.m.
    Type: Grant
    Filed: May 19, 1983
    Date of Patent: May 28, 1985
    Assignee: Nippon Kogaku K.K.
    Inventors: Yasutomo Seki, Toshio Akiyama, Norio Nakabayashi, Yutaka Iizuka