TREA

Hidesuke Miyairi

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  • Rihu, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Magnetic erasing head
    • Patent number 4,805,058
    • Issue date Feb 14, 1989
    • Sony Corporation
    • Giichi Takeuchi
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Method of electrolytically etching ferrite
    • Patent number 4,214,960
    • Issue date Jul 29, 1980
    • Sony Corporation
    • Tomio Kobayashi
    • C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR