Per-Olav Dahlin

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Borlange, SE

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Patents Grantslast 30 patents

Information Patent Grant
Automatic darkening filter with offset polarizers
- Patent number 7,884,888
- Issue date Feb 8, 2011
- 3M Innovative Properties Company
- Kristina M. Magnusson
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Automatic darkening filter with offset polarizers
- Patent number 7,477,330
- Issue date Jan 13, 2009
- 3M Innovative Properties Company
- Kristina M. Magnusson
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE

Patents Applicationslast 30 patents

Information Patent Application
AUTOMATIC DARKENING FILTER WITH OFFSET POLARIZERS
- Publication number 20090079886
- Publication date Mar 26, 2009
- 3M Innovative Properties Company
- Kristina M. Magnusson
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Application
Automatic darkening filter with offset polarizers
- Publication number 20060203148
- Publication date Sep 14, 2006
- Kristina M. Magnusson
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE