TREA

Kuo-Chou Chang

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  • Kaohsiung City, TW
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Patents Grantslast 30 patents

  • Information Patent Grant

    Method for treating waste printed circuit boards with molten mixtur...
    • Patent number 6,089,479
    • Issue date Jul 18, 2000
    • Cleanenv' Engineeering Consultant Co., Ltd.
    • Kuo-Ching Chang
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
  • Information Patent Grant

    U-shaped lock
    • Patent number 5,987,940
    • Issue date Nov 23, 1999
    • Kuo-Chou Chang
    • E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
  • Information Patent Grant

    Method of recycling waste printed circuit boards
    • Patent number 5,979,033
    • Issue date Nov 9, 1999
    • Cleanevi' Engineering Consultant Co., Ltd.
    • Kuo-Ching Chang
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
  • Information Patent Grant

    Lock
    • Patent number 5,964,107
    • Issue date Oct 12, 1999
    • Kuo-Chou Chang
    • E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES