Patents by Inventor Toshihide Zozawa

Toshihide Zozawa 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).

  • Zoom lens system comprising three lens units
    Patent number: 5434710
    Abstract: A zoom lens system comprising, in order from the object side, a first lens unit having a negative refractive power, a second lens unit having a positive refractive power and a third lens unit having a positive refractive power, and configured so as to vary a focal length thereof from a wide position to a tele position by moving the first lens unit non-linearly for maintaining an image surface at a constant location, and moving the second lens unit and the third lens unit from the image side toward the object side so that an airspace reserved between these two lens units is narrowed.
    Type: Grant
    Filed: December 22, 1992
    Date of Patent: July 18, 1995
    Assignee: Olympus Optical Co., Ltd.
    Inventor: Toshihide Zozawa