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United States Patent and Trademark Office
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full text and images.
Lightweight Aircraft
Patent 4206892
Issued June 10, 1980
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High Performance Bicycle Propulsion
Patent 5758735
Issued June 2, 1998
Aerial transport method and apparatus
Patent 6086015
Issued July 11, 2000
Doug Engelbart
Thomas Fogarty
Ashok Gadgil
Stephanie Kwolek
Paul MacCready
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