US Patent Issued to 3M Innovative Properties on Oct. 14 for "Bi-focal eyewear lens and eyeglasses including same" (Washington, Wisconsin, Minnesota Inventors)

ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,443,055, issued on Oct. 14, was assigned to 3M Innovative Properties Co. (St. Paul, Minn.).

"Bi-focal eyewear lens and eyeglasses including same" was invented by Zhisheng Yun (Sammamish, Wash.), Andrew J. Ouderkirk (Kirkland, Wash.), Susan L. Kent (Shorewood, Minn.), Erin A. McDowell (Afton, Minn.), Timothy L. Wong (West St. Paul, Minn.), John D. Le (Woodbury, Minn.) and Michael L. Steiner (New Richmond, Wis.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A bi-focal prescription eyewear lens includes a substrate and a reflective polarizer, or a partial reflector, bonded to the substrate. A reflective polarizer substantially transmits light having a firs...