ALEXANDRIA, Va., July 7 -- United States Patent no. 12,675,014, issued on July 7.
"Backlit road traffic sign" was invented by Jialiang Duan (Shenzhen, China) and Guanghui Wang (Yingshan County, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A backlit road traffic sign is provided, including a housing body, a control box, a main light-emitting device, and multiple warning light devices. The housing body is a flat structure and includes a frame, a rear panel, a front panel, a light-blocking film, a reflective base film, and a reflective pattern film. The main light-emitting device is disposed within the sealed cavity and electrically connected to the control box, light emitted from the main light-emittin...