Patents by Inventor Takeshisa Ishida

Takeshisa Ishida 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).

  • Magnetic recording and or reproducing apparatus and a recording medium thereof
    Patent number: 5483392
    Abstract: The present invention is directed to a magnetic recording and/or reproducing apparatus, in which a reference electrostatic capacity is formed by a wide pattern (23) radially formed over a plurality of recording tracks (22) and a calculation is performed by utilizing this reference electrostatic capacity so as to eliminate the fluctuation of stray capacitance in each of the electrodes (63a) and (63b) of a recording and reproducing head. Thus, the change of stray capacitance occuring due to the drift of temperature, the vibration of interconnection or the like can be eliminated.
    Type: Grant
    Filed: October 29, 1993
    Date of Patent: January 9, 1996
    Assignee: Sony Corporation
    Inventor: Takeshisa Ishida