Patents by Inventor Koichiro Sumiyoshi

Koichiro Sumiyoshi 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).

  • Patent number: 3958271
    Abstract: In a video tape recorder in which a video signal is recorded on a magnetic tape as a plurality of skewed tracks by a rotary magnetic head which is rotated in synchronism with a frame frequency signal contained in the video signal and in which a recorded video signal is reproduced by the rotary magnetic head from a magnetic tape on which a control signal representing the frame frequency has also been recorded, there is provided a detecting device which detects the time when the rotary magnetic head rotates in contact with the magnetic tape to a point beyond that corresponding to where the frame frequency signal in the video signal is recorded. The output signal from the detecting device is applied to a variable delay circuit.
    Type: Grant
    Filed: April 11, 1975
    Date of Patent: May 18, 1976
    Assignee: Sony Corporation
    Inventor: Koichiro Sumiyoshi