Chun Chieh Huang

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Nan-Tou Hsien, TW

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Patents Grantslast 30 patents

Information Patent Grant
Restrainable manhole cover, handhole cover and the open/close devic...
- Patent number 5,993,106
- Issue date Nov 30, 1999
- Chun Chieh Huang
- B66 - HOISTING LIFTING HAULING