 - Revenue increased 20 to 73.5 million in fiscal 2022 as compared to 61.5 million in fiscal 2021 - OLATHE, Kan. , July 15, 2022 PRNewswire -- Butler National Corporation OTCQB: BUKS, a leader in the growing global market for aircraft structural modification, maintenance, repair and overhaul MRO and a recognized provider of gaming management services, announces its financial results for the fourth quarter and fiscal year ended April 30, 2022. 