Kui Wong Yeung

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Kwai Chung, HK

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Patents Grantslast 30 patents

Information Patent Grant
Air-ventilator with high efficiency thermal exchanger and air filter
- Patent number 6,966,356
- Issue date Nov 22, 2005
- Housely Industries, Inc.
- Kui Wong Yeung
- F28 - HEAT EXCHANGE IN GENERAL

Patents Applicationslast 30 patents

Information Patent Application
Ventilator or ventilating apparatus with thermal exchanger and air...
- Publication number 20040139712
- Publication date Jul 22, 2004
- Kui Wong Yeung
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Application
Air-ventilator with high efficiency thermal exchanger and air filter
- Publication number 20040104008
- Publication date Jun 3, 2004
- Kui Wong Yeung
- F28 - HEAT EXCHANGE IN GENERAL