ALEXANDRIA, Va., May 19 -- United States Patent no. 12,631,303, issued on May 19, was assigned to CREE LIGHTING USA LLC (Racine, Wis.).

"Lighting devices having optical waveguides for controlled light distribution" was invented by Kurt Wilcox (Libertyville, Ill.), Jin Hong Lim (Morrisville, N.C.), Curt Progl (Raleigh, N.C.), Steve Wilcenski (Cary, N.C.) and Zongjie Yuan (Libertyville, Ill.).

According to the abstract* released by the U.S. Patent & Trademark Office: "In one aspect, optical elements and luminaires employing optical elements are described herein. In some embodiments, an optical element comprises a planar light transmissive body comprising a light input surface and a light output surface opposite the input surface, and light ...