ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,780,436, issued on Nov. 3, was assigned to Airbus Operations SAS (Toulouse, France).

"Aircraft having a locking device and a system for visual indication of the state of said locking device" was invented by Gregory De Oliveira (Toulouse, France), Thomas Bourdieu (Toulouse, France) and Julien Ferreira (Toulouse, France).

According to the abstract* released by the U.S. Patent & Trademark Office: "An aircraft with a visual indication system for indicating the locked or unlocked state of a locking device. The system comprises has an opening passing through a wall, a transparent wall closing off the opening and allowing an inner zone of the aircraft to be seen from an outer zone, an indica...