Patents by Inventor Yoshiki Takemoto

Yoshiki Takemoto 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).

  • Output control apparatus of semiconductor laser device
    Patent number: 5771220
    Abstract: A recording and reproducing apparatus includes a semiconductor laser device for irradiating a light beam, a driving circuit for driving the semiconductor laser device, and an oscillation device for generating a predetermined high-frequency signal. The high-frequency signal generated by this oscillation device is superposed onto a driving signal of the driving circuit in order to drive the semiconductor laser device.
    Type: Grant
    Filed: October 15, 1996
    Date of Patent: June 23, 1998
    Assignee: Sony Corporation
    Inventors: Masami Yuasa, Yoshiki Takemoto