Four-Dimension Design Studio Ltd.

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Hong Kong, HK

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Patents Grantslast 30 patents

Information Patent Grant
Glasses leg spring hinge structure
- Patent number 9,599,840
- Issue date Mar 21, 2017
- Four-Dimension Design Studio Ltd.
- Edwin Lam
- G02 - OPTICS

Patents Applicationslast 30 patents

Information Patent Application
NOVEL GLASSES LEG SPRING HINGE STRUCTURE
- Publication number 20170038602
- Publication date Feb 9, 2017
- FOUR-DIMENSION DESIGN STUDIO LIMITED
- Edwin Lam
- G02 - OPTICS

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