TREA

Junji Hirogane

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Patents Grantslast 30 patents

  • Information Patent Grant

    Dual surface optical memory disc
    • Patent number 4,740,947
    • Issue date Apr 26, 1988
    • Sharp Kabushiki Kaisha
    • Kenji Ohta
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Magneto-optic memory element
    • Patent number 4,719,137
    • Issue date Jan 12, 1988
    • Sharp Kabushiki Kaisha
    • Kenji Ohta
    • G11 - INFORMATION STORAGE