TREA

Sumihiro Yasuda

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  • Tokyo, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    PTC heating device
    • Patent number 4,874,924
    • Issue date Oct 17, 1989
    • TDK Corporation
    • Shinobu Yamamoto
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Grant

    PTC heating device
    • Patent number 4,728,779
    • Issue date Mar 1, 1988
    • TDK Corporation
    • Sho Kotani
    • H01 - BASIC ELECTRIC ELEMENTS