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Patents > Applicant person : Alfred E. Wunderlich or Sam Leonard Walkden & Citations from after 1930: None

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airplane (52) · propellers (52) · hybrid (36) · LTA (32) · automatic stability (10) · rarefaction (10) · gliders (10) · design (9) · sustentation (9) · Subsystem (9) · Stability (9) · propulsion (9) · ascension (7) · aerodynamics (7) · frame (4) · helicopter (4) · Equilibrium (3) · wings (3) · control (3)
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