Patents by Inventor Akihiko Yanagisawa

Akihiko Yanagisawa 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).

  • System and method for starting rotation of a disc in a disc storage unit
    Patent number: 5117315
    Abstract: A disc storage unit includes a processor for checking whether or not rotation of a disc occurs, head actuator for slightly displacing the head by a predetermined minute amount. At first, the disc is started and then the processor detects presence or absence of rotation of the disc, and the head is displaced slightly in a state in which driving force is applied to the disc by the head actuator.
    Type: Grant
    Filed: May 15, 1990
    Date of Patent: May 26, 1992
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Tatsutoshi Nagasaki, Takashi Miyashita, Akihiko Yanagisawa