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Patents > Inventors : Alfred E. Wunderlich or Alfred John Macy or Wald Gustafson

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propellers (46) · airplane (44) · hybrid (36) · LTA (36) · stability (23) · propulsion (11) · rarefaction (10) · sustentation (8) · ascension (7) · control (4) · helicopter (4) · human-powered (3) · design (3) · None (3) · automatic stability (3)
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