TREA

Youn Chyuan Liao

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  • Taichung, TW
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Patents Grantslast 30 patents

  • Information Patent Grant

    Ratchet tool having increased driving torque
    • Patent number 7,311,186
    • Issue date Dec 25, 2007
    • Youn Chyuan Liao
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Tool device having rotatable driving shank
    • Patent number 7,287,450
    • Issue date Oct 30, 2007
    • Youn Chyuan Liao
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Tool handle having tool receiving structure
    • Patent number 7,174,814
    • Issue date Feb 13, 2007
    • Youn Chyuan Liao
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Tool having detachable handle members
    • Patent number 7,039,975
    • Issue date May 9, 2006
    • Youn Chyuan Liao
    • Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Information Patent Grant

    Rotatable tool handle having a solid locking structure
    • Patent number 6,520,053
    • Issue date Feb 18, 2003
    • Youn Chyuan Liao
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Tool box
    • Patent number D446651
    • Issue date Aug 21, 2001
    • Youn Chyuan Liao
    • D03 - Travel goods and personal belongings
  • Information Patent Grant

    Screwdriver
    • Patent number 6,089,133
    • Issue date Jul 18, 2000
    • Youn Chyuan Liao
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS

Patents Applicationslast 30 patents