ALEXANDRIA, Va., March 24 -- United States Patent no. 12,583,420, issued on March 24, was assigned to Oshkosh Corp. (Oshkosh, Wis.).

"Fire apparatus level indication system" was invented by Eric R. Linsmeier (Larsen, Wis.) and David W. Archer (Hortonville, Wis.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A system for a vehicle includes control system configured to acquire a first indication regarding a slope of the vehicle at a current location, acquire a second indication regarding a grade of the vehicle at the current location, and generate a graphical user interface providing (a) a slope indicator indicating whether the slope of the vehicle is within an operational slope range or a nonoperational slope...