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Tsan-Chang Lee

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  • Taichung, TW
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Patents Grantslast 30 patents

  • Information Patent Grant

    Hand tool available for operating screw members of three different...
    • Patent number 11,426,839
    • Issue date Aug 30, 2022
    • Tsan-Chang Lee
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Ratchet wrench
    • Patent number 11,370,089
    • Issue date Jun 28, 2022
    • Tsan-Chang Lee
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Display structure for wrench
    • Patent number 10,967,498
    • Issue date Apr 6, 2021
    • Tsan-Chang Lee
    • G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
  • Information Patent Grant

    Engaging portion for a hand tool
    • Patent number 10,596,685
    • Issue date Mar 24, 2020
    • Tsan-Chang Lee
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Open wrench
    • Patent number 9,120,210
    • Issue date Sep 1, 2015
    • Tsan-Chang Lee
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Pawl structure for ratchet wrenches and the wrenches using the same
    • Patent number 9,114,510
    • Issue date Aug 25, 2015
    • Tsan-Chang Lee
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Ratchet wrench
    • Patent number 9,016,174
    • Issue date Apr 28, 2015
    • Tsan-Chang Lee
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Pawl of a ratchet wrench
    • Patent number D708920
    • Issue date Jul 15, 2014
    • Tsan-Chang Lee
    • D08 - Tools and hardware
  • Information Patent Grant

    Ratchet wrench
    • Patent number 8,661,946
    • Issue date Mar 4, 2014
    • Tsan-Chang Lee
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    One-direction rachet wrench
    • Patent number 8,261,635
    • Issue date Sep 11, 2012
    • Tsan-Chang Lee
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS

Patents Applicationslast 30 patents

  • Information Patent Application

    ENGAGING STRUCTURE FOR HAND TOOL
    • Publication number 20250042000
    • Publication date Feb 6, 2025
    • Tsan-Chang Lee
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    Ratchet Wrench
    • Publication number 20240391064
    • Publication date Nov 28, 2024
    • Tsan-Chang Lee
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    Wrench Structure
    • Publication number 20240293918
    • Publication date Sep 5, 2024
    • Tsan-Chang Lee
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    Ratchet Wrench Structure
    • Publication number 20240198496
    • Publication date Jun 20, 2024
    • Tsan-Chang Lee
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    Hand Tool Available for Operating Screw Members of Three Different...
    • Publication number 20220226969
    • Publication date Jul 21, 2022
    • Tsan-Chang Lee
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    Ratchet Wrench
    • Publication number 20210347017
    • Publication date Nov 11, 2021
    • Tsan-Chang Lee
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    DISPLAY STRUCTURE FOR WRENCH
    • Publication number 20200130166
    • Publication date Apr 30, 2020
    • Tsan-Chang Lee
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    ENGAGING PORTION FOR A HAND TOOL
    • Publication number 20190217449
    • Publication date Jul 18, 2019
    • Tsan-Chang Lee
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    HAND TOOL WITH INDICATION PORTION ON HANDLE
    • Publication number 20160129581
    • Publication date May 12, 2016
    • Tsan-Chang Lee
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    OPEN WRENCH
    • Publication number 20150027278
    • Publication date Jan 29, 2015
    • Tsan-Chang Lee
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    PAWL STRUCTURE FOR RATCHET WRENCHES AND THE WRENCHES USING THE SAME
    • Publication number 20140366690
    • Publication date Dec 18, 2014
    • Tsan-Chang Lee
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    RATCHET WRENCH
    • Publication number 20140000415
    • Publication date Jan 2, 2014
    • Tsan-Chang Lee
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    RATCHET WRENCH
    • Publication number 20130032008
    • Publication date Feb 7, 2013
    • Tsan-Chang Lee
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    ONE-DIRECTION RACHET WRENCH
    • Publication number 20110100165
    • Publication date May 5, 2011
    • Tsan-Chang Lee
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS