Patents by Inventor Keiko Noji

Keiko Noji 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: 4223358
    Abstract: A method and apparatus for cancelling remanent deflection in a piezoceramic head support means which is used in a video recorder that is operative in selected operating modes. In one of such modes, such as the reproducing mode, a tracking control signal is supplied to the piezoceramic support means, thereby causing the piezoceramic support means to deflect and to correspondingly displace the head supported thereby in a direction transversely of the trace which is scanned by that head. When the video signal recorder is changed over between selected operating modes, an oscillating signal is supplied to the piezoceramic support means for a predetermined duration, the maximum magnitude of the oscillating signal being less than E.sub.c, wherein E.sub.c is the largest magnitude of the tracking control signal to which the piezoceramic means responds. The magnitude of the oscillating signal is gradually reduced to a minimum level during this predetermined duration.
    Type: Grant
    Filed: April 30, 1979
    Date of Patent: September 16, 1980
    Assignee: Sony Corporation
    Inventors: Yukio Kubota, Keiko Noji, Yoshimi Watanabe