Jin-Chai Cho

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Taipei, TW

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Patents Grantslast 30 patents

Information Patent Grant
Universal socket for socket wrench
- Patent number 6,138,534
- Issue date Oct 31, 2000
- Jin-Chai Cho
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
Information Patent Grant
Universal socket for use with a socket wrench
- Patent number 6,023,999
- Issue date Feb 15, 2000
- Jin-Chai Cho
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS