In the 1930's, Harold Pitcairn bought the Spanish autogyro patent and propelled it to new heights in the U.S.
In the 1930's, Harold Pitcairn bought the Spanish autogyro patent and propelled it to new heights in the U.S. In the 1930's, Harold Pitcairn bought the Spanish autogyro patent and propelled it to new heights in the U.S.« less
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