Patents by Inventor Soh Ohzawa

Soh Ohzawa 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).

  • Photographic lens system
    Patent number: 5398136
    Abstract: A single focal length lens system has a first negative lens element and a last negative lens element. The first negative lens element is disposed at an object side end of the lens system and the object side surface thereof is concave. The last negative lens element is disposed at an image side end of the lens system. The lens system fulfills the following condition: ##EQU1## wherein .phi.f represents the refractive power of the first negative lens element; and .phi.1 represents the refractive power of the last negative lens element.
    Type: Grant
    Filed: December 21, 1992
    Date of Patent: March 14, 1995
    Assignee: Minolta Co., Ltd.
    Inventors: Soh Ohzawa, Junji Hashimura