Patents by Inventor Shuichi Mitsuzuka

Shuichi Mitsuzuka 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).

  • Information processing apparatus using a semiconductor laser diode
    Patent number: 4449204
    Abstract: An optical information processing apparatus comprises an information recording medium, a semiconductor laser diode for issuing a laser beam and an optical system adapted to direct the issued laser beam from the semiconductor laser diode toward the information recording medium and then return the reflected laser beam from the medium to the diode and provided with means capable of rotating the plane of polarization of the reflected laser beam from the medium by 90.degree. relative to the plane of polarization of the issued laser beam.
    Type: Grant
    Filed: March 27, 1981
    Date of Patent: May 15, 1984
    Assignees: Agency of Industrial Science and Technology, Ministry of International Trade and Industry
    Inventors: Junichi Shimada, Yoshinobu Mitsuhashi, Kenjiro Sakurai, Takitaro Morikawa, Shuichi Mitsuzuka