Word: aerofoil
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Dates: during 2000-2009
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...hundreds of dollars less. But before you set your sights on a bootleg version, Samways says that the Air Multiplier's deceivingly simple structure is the result of a laborious design process that can't be easily copied. "We have many patents on this [fan], on the impeller, aerofoil and product development," he says. Whether those patents can stand up to the sheer bureaucracy of enforcing them in China remains to be seen...
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