TREA

Chen-Keng Chih

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  • Taichung, TW
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Patents Grantslast 30 patents

  • Information Patent Grant

    Fast pipe joint
    • Patent number 6,062,537
    • Issue date May 16, 2000
    • Chen-Chien Chih
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Device for punching holes in a bicycle rim
    • Patent number 5,896,796
    • Issue date Apr 27, 1999
    • Chen-Keng Chih
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Grease pumping assembly
    • Patent number 5,544,791
    • Issue date Aug 13, 1996
    • Chen-keng Chih
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...