TREA

Tsang J. Tsai

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  • Tainan, TW
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Patents Grantslast 30 patents

  • Information Patent Grant

    Safety gas valve with timer
    • Patent number 4,690,170
    • Issue date Sep 1, 1987
    • Tzong D. Tsai
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...