TREA

Hiroshi Ogawa

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  • Kanagawa, JA
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Patents Grantslast 30 patents

  • Information Patent Grant

    Magnetic recording medium
    • Patent number 4,076,890
    • Issue date Feb 28, 1978
    • Fuji Photo Film Co., Ltd.
    • Yasuyuki Yamada
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Magnetic recording substance
    • Patent number 4,076,861
    • Issue date Feb 28, 1978
    • Fuji Photo Film Co., Ltd.
    • Masahiko Furukawa
    • B22 - CASTING POWDER METALLURGY
  • Information Patent Grant

    Magnetic recording member
    • Patent number 4,071,654
    • Issue date Jan 31, 1978
    • Fuji Photo Film Co., Ltd.
    • Hiroshi Ogawa
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Process for production of ferromagnetic powder
    • Patent number 4,063,000
    • Issue date Dec 13, 1977
    • Fuji Photo Film Co., Ltd.
    • Masashi Aonuma
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Magnetic recording material
    • Patent number 4,049,871
    • Issue date Sep 20, 1977
    • Fuji Photo Film Co., Ltd.
    • Hiroshi Ogawa
    • G11 - INFORMATION STORAGE