Otto L. Poon

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North Point, HK

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Patents Grantslast 30 patents

Information Patent Grant
Safety brake arrangement for elevators
- Patent number 5,230,406
- Issue date Jul 27, 1993
- Otto L. Poon
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Lift
- Patent number 4,928,796
- Issue date May 29, 1990
- Otto L. Poon
- B66 - HOISTING LIFTING HAULING