Dubbed "the world's prettiest and best-designed airborne automobile so far" by US aviation magazine Flying and Inhabitat.com design, an innovation website, the Aeromobil also has the distinction of originating in Slovakia, the world's largest per-capita car producer.
"So far there have been about twenty attempts to manufacture a flying car around the globe," the president of the Slovak Ultra Light Aviation Federation, Milan Ciba, told AFP. "Among them, Aeromobil appears very viable," he said.
Other models include the US-based Terrafugia's "Transition" flying car expected to be launched on the market within a year, while the helicopter-type Dutch PAL-V gyrocopter could go on sale in this year.
Klein's dream took to the skies in September when he piloted the Aeromobil during its first wobbly test flight. Once airborne, the it can reach a top speed of 200km/h (124 mph) and travel as far as 700 km (430 miles), consuming 15 liters (4 gallons) of petrol per hour.
"A combination of a car and a plane will always lose against the competition when we start comparing energy consumption," Jan Lesinsky from the Slovak University of Technology told AFP.