Andrea Lejewski

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Munstertal, DE

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Patents Grantslast 30 patents

Information Patent Grant
Respirator valve
- Patent number 11,445,771
- Issue date Sep 20, 2022
- 3M Innovative Properties Company
- Christopher P. Henderson
- A41 - WEARING APPAREL

Patents Applicationslast 30 patents

Information Patent Application
Respirator Valve
- Publication number 20170340031
- Publication date Nov 30, 2017
- 3M Innovative Properties Company
- Christopher P. Henderson
- A41 - WEARING APPAREL