Patents by Inventor Mitsuhiro Terada

Mitsuhiro Terada 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).

  • Optical storage inspection unit calibration disk
    Patent number: 4988194
    Abstract: A calibration disk used for an optical disk inspection unit to correct the measurement values of the mechanical characteristics, such as plane deflection and eccentricity of optical disks, and comprising at least one of three correction sections: an axial displacement correction section, a radial displacement correction section, and a focus error output voltage correction section which are formed on one or both sides of the calibration disk, concentric to the center of rotation of the disk so that measurement values, such as the surface deflection, can be corrected automatically and accurately by simply setting the calibration disk on an inspection unit.
    Type: Grant
    Filed: June 23, 1988
    Date of Patent: January 29, 1991
    Assignees: Kyocera Corporation, Nippon Telegraph and Telephone Corporation, Shindenshikogyo Corporation
    Inventors: Shigeji Hara, Takashi Yoshizawa, Kanae Kinoshita, Masahiko Sakamoto, Mitsuhiro Terada, Youji Suzuki