TREA

Kazuya Yamashita

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  • Osaka, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Joint for corrugated pipe
    • Patent number 6,367,849
    • Issue date Apr 9, 2002
    • Totaku Industries, Inc.
    • Yoshiaki Tatsuta
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Corrugated synthetic resin pipe
    • Patent number 6,131,616
    • Issue date Oct 17, 2000
    • Totaku Industries, Inc.
    • Yoshiaki Tatsuta
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...