ALEXANDRIA, Va., May 19 -- United States Patent no. 12,629,995, issued on May 19, was assigned to Textron Ground Support Equipment Inc. (Cartersville, Ga.).

"Door assemblies for ground support tractors" was invented by Alexandra Elizabeth Crump (Cartersville, Ga.) and Kevin Michael Ayotte (Acworth, Ga.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A ground support tractor includes a wheeled chassis having a cabin mounted thereon. A door assembly is coupled to the cabin. The door assembly includes a lower track having a ramp and a door slidably received by the lower track and translatable in a first direction relative to the cabin between a closed position and an open position. The door includes a main panel...