ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,509,829, issued on Dec. 30.
"Reflective road marker" was invented by David E. Lambert (Columbus, Ohio).
According to the abstract* released by the U.S. Patent & Trademark Office: "A road marker disclosed herein includes a single piece of material having a width of approximately three inches or less. The piece includes a top surface, a bottom surface, and a sloped face disposed between the top surface and the bottom surface. The bottom surface is configured to enable the bottom surface to be connected directly to a floor of a channel of a roadway. The road marker further includes a reflector disposed on the sloped face. Another road marker disclosed herein includes a reflecting member...