Patents by Inventor Ito Tetsuo

Ito Tetsuo 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).

  • Beam spot control device using a thin micro lens with an actuator
    Patent number: 4775967
    Abstract: In the present invention, a micro Fresnel lens in the shape of a thin film is used. A lens driving member constructed of piezoelectric transducers or of magnets and coils is disposed around the lens. The focus of the lens is adjusted by controlling applied voltages to the piezoelectric transducers or the coils.
    Type: Grant
    Filed: October 11, 1985
    Date of Patent: October 4, 1988
    Assignee: Hitachi, Ltd.
    Inventors: Satoshi Shimada, Hiroshi Sasaki, Nobuyoshi Tsuboi, Hideki Nihei, Norifumi Miyamoto, Ito Tetsuo, Yoshio Sato, Atsumi Watanabe, Ryo Hiraga