Herman Yik Wai Tsui

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Ferry Point, HK

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for air purification and disinfection
- Patent number 9,381,267
- Issue date Jul 5, 2016
- ALPHATECH INTERNATIONAL LIMITED
- Herman Yik Wai Tsui
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Apparatus for air purification and disinfection
- Patent number 8,361,402
- Issue date Jan 29, 2013
- Alphatech International Limited
- Herman Yik Wai Tsui
- B03 - SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES O...

Patents Applicationslast 30 patents

Information Patent Application
DIFFUSIVE PLASMA AIR TREATMENT AND MATERIAL PROCESSING
- Publication number 20190287763
- Publication date Sep 19, 2019
- Alphatech International Limited
- Herman Yik Wai TSUI
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Application
APPARATUS FOR AIR PURIFICATION AND DISINFECTION
- Publication number 20140178254
- Publication date Jun 26, 2014
- Herman Yik Wai TSUI
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE