The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 01, 2019
Filed:
Feb. 01, 2016
Applicant:
3m Innovative Properties Company, St. Paul, MN (US);
Inventors:
Kristina M. Magnusson, Djurmo, SE;
Kenneth Jarefors, Borlänge, SE;
Assignee:
3M Innovative Properties Company, St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61F 9/06 (2006.01); G02B 26/02 (2006.01); H04N 5/235 (2006.01); B23K 9/095 (2006.01);
U.S. Cl.
CPC ...
A61F 9/061 (2013.01); A61F 9/067 (2013.01); B23K 9/095 (2013.01); G02B 26/02 (2013.01); H04N 5/2351 (2013.01); H04N 5/2353 (2013.01);
Abstract
Automatic darkening filters are often provided on a protective headgear, where protection from high intensity light is desired. An automatic darkening filter includes a switchable shutter, a shutter control system, a light sensor, and an imaging acquisition device. The switchable shutter is capable of assuming at least a dark state, a light state and an intermediate state.