Patents by Inventor Hiraku Sigiki

Hiraku Sigiki 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: 4714971
    Abstract: In an apparatus for reproducing signals recorded in a plurality of slant tracks on a recording medium by a rotary head, the signals in the tracks contain a digital information signal in a first predetermined area on the slant tracks and a tracking control signal including a tracking pilot signal and an erase signal in a second predetermined area. When the recorded tracks are reproduced by a rotary playback head having a tracing width greater than the track width, the pilot signals from the adjacent tracks will be detected and compared in level. A tracking signal for controlling the tracking alignment of the rotary playback head is generated in response to the level comparison. The level of the tracking signal is adjusted in response to the level of the tracking control signal.
    Type: Grant
    Filed: August 26, 1985
    Date of Patent: December 22, 1987
    Assignee: Sony Corporation
    Inventors: Hiraku Sigiki, Makoto Yamada, Shinji Miyamori