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Patents > Applicant person : Alfred E. Wunderlich or Alfred John Macy or Bruno von Bültzingslöwen

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propellers (49) · airplane (44) · hybrid (37) · LTA (32) · stability (23) · rarefaction (10) · sustentation (9) · ascension (9) · propulsion (9) · helicopter (5) · design (5) · None (4) · control (4) · automatic stability (3)
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