US Patent Issued to 3M Innovative Properties on May 13 for "Optical system and optical construction" (Minnesota Inventors)

ALEXANDRIA, Va., June 12 -- United States Patent no. 12,298,228, issued on May 13, was assigned to 3M Innovative Properties Co. (St. Paul, Minn.).

"Optical system and optical construction" was invented by Bharat R. Acharya (Woodbury, Minn.) and John A. Wheatley (Stillwater, Minn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical construction includes a first chamber including one or more first walls disposed inside a second chamber including one or more second walls. The first chamber includes a first top and an opposite closed first bottom. The second chamber includes an open second top proximate the open first top and an opposite second bottom proximate the closed first bottom. At least a portion o...