TREA

Hsi-Fu Chang

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  • Shindian City, TW
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Patents Grantslast 30 patents

  • Information Patent Grant

    Keyboard
    • Patent number 6,677,931
    • Issue date Jan 13, 2004
    • Leadtek Research Inc.
    • Ching-Shou Chi
    • G06 - COMPUTING CALCULATING COUNTING

Patents Applicationslast 30 patents

  • Information Patent Application

    Method for manufacturing a keypad
    • Publication number 20020011689
    • Publication date Jan 31, 2002
    • Ching-Shou Chi
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Application

    Keyboard
    • Publication number 20010055003
    • Publication date Dec 27, 2001
    • Ching-Shou Chi
    • G06 - COMPUTING CALCULATING COUNTING