ALEXANDRIA, Va., June 19 -- United States Patent no. 12,332,473, issued on June 17, was assigned to 3M Innovative Properties Co. (St. Paul, Minn.).

"Azimuthally anisotropic polarization sensitive optical filter" was invented by Bharat R. Acharya (Woodbury, Minn.), John A. Wheatley (Stillwater, Minn.) and Andrew J. Carlson (Eagan, Minn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical construction includes an optical film between first and second prismatic films, which each include pluralities of parallel, linear first and second prisms. Each of the first and second prisms have opposing first and second sides extending from first and second ends of a base of the prism and meeting at a peak. The first...