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Patents > Inventors : Alfred E. Wunderlich or Gustav Mees or Édouard-Jean Bigourdan

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propellers (62) · airplane (57) · hybrid (53) · LTA (34) · helicopter (21) · ascension (13) · None (12) · propulsion (12) · design (12) · stability (11) · rarefaction (10) · gyroscope (9) · sustentation (8) · propeller (7) · heavier-than-air (6) · frame (6) · takeoff (6) · control (5) · hydroplane (4)
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None (63)
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