Patents by Inventor Shinzi Nagatsuna

Shinzi Nagatsuna 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).

  • Image developing device for electrophotography
    Patent number: 4835565
    Abstract: An electrophotographic image developing device includes a fixed rotatable member and a suspended rotatable member reciprocally movable toward and away from the fixed rotatable member. Rotative power from a drive source is transmitted to the suspended rotatable member through a power transmitting unit which includes a coupling capable of absorbing axial misalignment between driver and driven shafts.
    Type: Grant
    Filed: June 11, 1987
    Date of Patent: May 30, 1989
    Assignee: Ricoh Company, Ltd.
    Inventors: Shinzi Nagatsuna, Toshihiko Takaya, Kinzi Saito, Hiroyuki Matsushiro, Michihito Ohashi