Patents by Inventor Yukinori Ohtani

Yukinori Ohtani 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 disk device
    Patent number: 5402276
    Abstract: A magnetic disk device using a pattern in which a plurality of pulse trains functioning as a demodulation start synchronization mark, having one-half a frequency of a clock synchronization PLOSYNC but having mutually different pulse numbers, are dispersedly arranged in pulse trains having the same frequency as that of the clock synchronization PLOSYNC, and also using, as a unit for detecting the demodulation start synchronization mark, a unit which confirms coincidence of the pattern in a time unit of one period of the pulse trains of the clock synchronization PLOSYNC and recognizes the demodulation start synchronization mark by complete coincidence of the demodulation start synchronization mark with the pattern or by coincidence of at least a predetermined number of the demodulation start synchronization marks with the pattern.
    Type: Grant
    Filed: May 17, 1993
    Date of Patent: March 28, 1995
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Satoru Honma, Kazuoki Otani, Yukinori Ohtani