Patents by Inventor Yosiho Suzuki

Yosiho Suzuki 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).

  • Method for recording and reproducing information by pre-pits detection
    Patent number: 6295258
    Abstract: A beam is irradiated to an information recording medium having land tracks and groove tracks alternately formed on a track formed in turn on an information recording surface thereof and pre-pits so pre-formatted as to deviate from the center of the track, a return beam of the irradiated beam is received by detectors split into two parts in a track direction to obtain a differential signal, the pre-pit is detected from this differential signal and control of recording and reproducing processings is executed by using the pre-pit detection signal so obtained as the reference.
    Type: Grant
    Filed: September 11, 2000
    Date of Patent: September 25, 2001
    Assignees: Hitachi, Ltd., Hitachi Video & Information System, Inc.
    Inventors: Toshimitsu Kaku, Toru Kawashima, Takehiko Sekine, Hisataka Sugiyama, Yosiho Suzuki, Tetsuya Fushimi
  • Method and apparatus for recording/reproducing by pre-pits detection
    Patent number: 6188654
    Abstract: A beam is irradiated to an information recording medium having land tracks and groove tracks alternately formed on a track formed in turn on an information recording surface thereof and pre-pits so pre-formatted as to deviate from the center of the track, a return beam of the irradiated beam is received by detectors split into two parts in a track direction to obtain a differential signal, the pre-pit is detected from this differential signal and control of recording and reproducing processings is executed by using the pre-pit detection signal so obtained as the reference.
    Type: Grant
    Filed: June 22, 1998
    Date of Patent: February 13, 2001
    Assignees: Htachi, Ltd., Hatachi Video & Information System, Inc.
    Inventors: Toshimitsu Kaku, Toru Kawashima, Takehiko Sekine, Hisataka Sugiyama, Yosiho Suzuki, Tetsuya Fushimi