Patents by Inventor Shinji Yabe

Shinji Yabe 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).

  • Macro-focussing rear converter lens
    Patent number: 4468107
    Abstract: A macro-focusing rear converter lens system adapted to be inserted between a camera body and a master lens assembly comprises a cylindrical main body which is mounted on the camera body. A rear converter lens assembly for elongating the focal length of the master lens is mounted in fixed relation on the camera body. The master lens assembly is mounted on the front end of a tube which is fitted coaxially within the main body and is movably axially by means of a helicoidal threaded rotatable ring interposed between the main body and the tube on which the master lens assembly is mounted. The interval between the camera body and the master lens assembly can thus be varied by rotating the rotatable ring. A leverage system in the main body transmits an F number signal from the master lens system to the camera body.
    Type: Grant
    Filed: July 13, 1982
    Date of Patent: August 28, 1984
    Assignee: Yabe Optical Inst. Mfg. Co., Ltd.
    Inventor: Shinji Yabe