Yan ZHANG

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Hong Kong, HK

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Patents Grantslast 30 patents

Information Patent Grant
Dual lens eyeglasses
- Patent number 8,545,010
- Issue date Oct 1, 2013
- Okia Optical Co. Ltd
- Yin Sang Lam
- G02 - OPTICS

Patents Applicationslast 30 patents

Information Patent Application
Dual Lens Eyeglasses
- Publication number 20120099074
- Publication date Apr 26, 2012
- OKIA OPTICAL COMPANY LIMITED
- Yin Sang LAM
- G02 - OPTICS