Drilldown: Patents

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Patents > Granted: No & Publication date: 1900 - 1999 & Citations from after 1930: None

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airplane (11) · frame (6) · Design (6) · construction (5) · wings (4) · stability (4) · biplane (4) · parachutes (3) · None (3) · military (2) · flapping (2) · subsystem (2) · Hybrid (2) · safety (2) · kite (2) · propulsion (2) · propeller (2)
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