ALEXANDRIA, Va., Feb. 19 -- United States Patent no. 12,230,130, issued on Feb. 18, was assigned to Metra Sign Inc. (Waterloo, Canada).
"System and method for vehicle traffic signaling" was invented by Mohammad Chavoshi (Kitchener, Canada).
According to the abstract* released by the U.S. Patent & Trademark Office: "A radar traffic sign apparatus is provided comprising an electronic or a motorized radar traffic sign. The electronic sign has at least one metasurface to shape complex configurations such as plane and/or corner reflectors. Each metasurface has a top layer of PCB board for controllable elements, a ground layer, and biasing means comprising diodes or switches. The state of the sign can be changed by the elements attached to the ...