Kwok Wang-On

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Kowloon, HK

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Patents Grantslast 30 patents

Information Patent Grant
Water tank for a flushing system with two-step flow control
- Patent number 5,235,707
- Issue date Aug 17, 1993
- Kwok Wang-on
- E03 - WATER SUPPLY SEWERAGE
Information Patent Grant
Siphon-operated water tank for a flushing system
- Patent number 5,140,712
- Issue date Aug 25, 1992
- Kwok Wang-On
- E03 - WATER SUPPLY SEWERAGE