ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,510,753, issued on Dec. 30.
"Aircraft heads up display" was invented by John C. Kroack (Everett, Wash.).
According to the abstract* released by the U.S. Patent & Trademark Office: "The aircraft heads up display is an instrument for use with an aircraft. The aircraft heads up display is a mechanical structure. The aircraft heads up display measures: a) the roll angle of the aircraft; b) the pitch angle of the aircraft; and, c) the slip angle of the aircraft. The aircraft heads up display incorporates an instrument structure and an accessory structure. The instrument structure measures the roll angle, the pitch angle, and the slip angle of the aircraft. The accessory structure is an op...