Wai-Man Lai

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Aberdeen, HK

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Patents Grantslast 30 patents

Information Patent Grant
Building block for rolling shutter
- Patent number 6,041,847
- Issue date Mar 28, 2000
- Wai-Man Lai
- Man-Chi Lai
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS