TREA

Katuya Kumagai

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  • Yokohama, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Magnetic recording medium
    • Patent number 4,540,627
    • Issue date Sep 10, 1985
    • Kabushiki Kaisha Toshiba
    • Akio Ishizawa
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Magnetic recording medium
    • Patent number 4,511,617
    • Issue date Apr 16, 1985
    • Tokyo Shibaura Denki Kabushiki Kaisha
    • Shozo Hideyama
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Method for manufacturing information recording medium
    • Patent number 4,395,435
    • Issue date Jul 26, 1983
    • Tokyo Shibaura Denki Kabushiki Kaisha
    • Hideo Sanpei
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...