ALEXANDRIA, Va., June 17 -- United States Patent no. 12,311,835, issued on May 27.

"Rear window-mounted double-sided display for emergency vehicle use" was invented by Richard Bourque (San Jose, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Embodiments of the present invention provide electronic display devices capable of displaying information that is observable to the public (e.g., other motorists and pedestrians) without substantially impacting the visibility of the driver. Embodiments include a display panel facing out from the vehicle that is visible from the exterior, and a display device pointing to the inside of the vehicle that reproduces the scene behind the vehicle in a way that is visible...