Patents by Inventor Takase Hiroshi

Takase Hiroshi 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).

  • Bright and compact optical-compensation type zoom lens system
    Patent number: 4377325
    Abstract: A bright and compact optical-compensation type zoom lens system comprising a first lens group I having positive refractive power, a second lens group II having negative refractive power, a third lens group III having positive refractive power, and a fourth lens group IV having positive refractive power, the zoom lens system being arranged to carry out zooming by keeping the lens groups II and IV fixed and moving the lens groups I and III, the zoom lens system being arranged so that the focal length in the tele-position is long and, moreover, the quality of image is good.
    Type: Grant
    Filed: February 17, 1981
    Date of Patent: March 22, 1983
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Takase Hiroshi, Tadashi Kimura