Patents by Inventor Takayuki Ohie

Takayuki Ohie 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).

  • Tracking servo apparatus of disk player
    Patent number: 5025434
    Abstract: There is provided a tracking servo apparatus of a disk player comprising: off-track detecting means for detecting that an information reading spot of a pickup does not exist on an information recording track of a disk and for generating an off-track signal; and level control means for increasing an amplitude of a tracking error signal when the off-track signal exists, whereby the stable tracking servo operation can be executed.
    Type: Grant
    Filed: June 8, 1989
    Date of Patent: June 18, 1991
    Assignee: Pioneer Electronic Corporation
    Inventors: Kiyoshi Tateishi, Haruyasu Sakata, Yuji Tawaragi, Masanori Suzuki, Takayuki Ohie