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Yoshio Kawakami

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  • Toobumachi, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Magnetic recording medium
    • Patent number 4,673,622
    • Issue date Jun 16, 1987
    • TDK Electronics Co., Ltd.
    • Noribumi Kajimoto
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Magnetic recording medium
    • Patent number 4,452,863
    • Issue date Jun 5, 1984
    • TDK Electronics Co., Ltd.
    • Masahiro Takizawa
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Magnetic recording medium
    • Patent number 4,423,452
    • Issue date Dec 27, 1983
    • TDK Electronics Co., Ltd.
    • Norifumi Kajimoto
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Leader tape
    • Patent number 4,422,119
    • Issue date Dec 20, 1983
    • Yoshio Kawakami
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Lubricant sheet for magnetic tape cassette
    • Patent number 4,376,519
    • Issue date Mar 15, 1983
    • TDK Electronics Co., Ltd.
    • Toshihiko Ishida
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Magnetic tape cassette
    • Patent number 4,363,059
    • Issue date Dec 7, 1982
    • TDK Electronics Co., Ltd.
    • Yoneo Matsuzawa
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Magnetic recording tape
    • Patent number 4,338,367
    • Issue date Jul 6, 1982
    • TDK Electronics Co., Ltd.
    • Yoshio Kawakami
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Magnetic recording tape
    • Patent number 4,304,807
    • Issue date Dec 8, 1981
    • TDK Electronics Co. Ltd.
    • Yoshio Kawakami
    • G11 - INFORMATION STORAGE