Patents by Inventor Toshiya Shinbayashi

Toshiya Shinbayashi 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 information recording and reproducing apparatus with amplitude limitation of a detected signal in a write operation mode
    Patent number: 4855988
    Abstract: The hold mode period of a sample/hold circuit disposed in a control system for controlling a laser diode so as to keep constant luminous power contains the information signal write period, and a third drive circuit for making proper the low level of modulation current of the laser diode is disposed to maintain the low level of laser light in write operation at the proper value.
    Type: Grant
    Filed: December 19, 1986
    Date of Patent: August 8, 1989
    Assignee: Hitachi, Ltd.
    Inventors: Toshiya Shinbayashi, Takashi Takeuchi