Hang Ching KWOK

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Patents Grantslast 30 patents

Information Patent Grant
Protective masks with coating comprising different electrospun fibe...
- Patent number 10,201,198
- Issue date Feb 12, 2019
- Profit Royal Pharmaceutical Limited
- Ho Wang Tong
- A41 - WEARING APPAREL

Patents Applicationslast 30 patents

Information Patent Application
PROTECTIVE MASKS WITH COATING COMPRISING DIFFERENT ELECTROSPUN FIBE...
- Publication number 20160174631
- Publication date Jun 23, 2016
- Profit Royal Pharmaceutical Limited
- Ho Wang TONG
- A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING