TREA

Chiu-Man Chang-Kao

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  • Taichung Hsien, TW
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Patents Grantslast 30 patents

  • Information Patent Grant

    Chuck apparatus
    • Patent number 6,874,791
    • Issue date Apr 5, 2005
    • Tsai-Ching Chen
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Chuck device for miniature tool bits
    • Patent number 6,637,755
    • Issue date Oct 28, 2003
    • Tsai-Ching Chen
    • Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Information Patent Grant

    Screwdriver shank with a universal joint
    • Patent number 6,490,955
    • Issue date Dec 10, 2002
    • Chiu-Man Chang-Kao
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Tool holder and tools combination
    • Patent number 6,446,341
    • Issue date Sep 10, 2002
    • Mei-Chen Wang
    • B26 - HAND CUTTING TOOLS CUTTING SEVERING
  • Information Patent Grant

    Chuck device for tools
    • Patent number 6,325,393
    • Issue date Dec 4, 2001
    • Tsai-Ching Chen
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Chuck device for tool bits
    • Patent number 6,270,085
    • Issue date Aug 7, 2001
    • Tsai-Ching Chen
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Tool holder
    • Patent number 6,134,788
    • Issue date Oct 24, 2000
    • Tsai-Ching Chen
    • B26 - HAND CUTTING TOOLS CUTTING SEVERING

Patents Applicationslast 30 patents