"1918Z"^^ . "2006Z"^^ . . . . . "2006-11-30Z"^^ . . . . . "American inventor" . "Greene, Leonard"@en . . "Leonard Michael Greene"@en . "Leonard Michael Greene (June 8, 1918 \u2013 November 30, 2006) was an American inventor and aerodynamics engineer who held more than 200 patents, many of which are aviation-related. He is most well known for his contributions to aviation technology, including his invention, the Aircraft Stall Warning device, which warns pilots when a deadly aerodynamic stall is imminent."@en . "1918-06-08Z"^^ . . . . . . . . . . .