Fengyan Qu

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He Bai Province, CN

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Patents Grantslast 30 patents

Information Patent Grant
Stress deformable and sealed breathing mask
- Patent number 8,910,634
- Issue date Dec 16, 2014
- Jianchun Lu
- A41 - WEARING APPAREL

Patents Applicationslast 30 patents

Information Patent Application
STRESS DEFORMABLE AND SEALED BREATHING MASK
- Publication number 20110308525
- Publication date Dec 22, 2011
- Jianchun Lu
- A62 - LIFE-SAVING FIRE-FIGHTING