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Hung-yi Chang

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  • Hsien, TW
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Patents Grantslast 30 patents

  • Information Patent Grant

    Theftproof lock device for a suitcase
    • Patent number 6,568,225
    • Issue date May 27, 2003
    • Hung-yi Chang
    • E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
  • Information Patent Grant

    Theftproof lock structure
    • Patent number 6,357,265
    • Issue date Mar 19, 2002
    • Hung-yi Chang
    • E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES