Patents by Inventor Ikuya Turukawa

Ikuya Turukawa 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).

  • Multi-focus camera
    Patent number: 4791441
    Abstract: A two-focus camera in which a short focal-distance lens system is constituted by only a main lens when the main lens is set at a first position on an optical axis and a converter lens is set at a second position out of the optical axis, and a longer focal-distance lens system is constituted by the main lens and the converter lens when the main lens is set at a third position in front of the first position on the optical axis and the converter lens system is set at a fourth position behind the main lens on the optical axis.
    Type: Grant
    Filed: October 27, 1987
    Date of Patent: December 13, 1988
    Assignee: Ricoh Company, Ltd.
    Inventors: Kohichi Nishi, Kunihisa Yamaguchi, Ikuya Turukawa