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Patents > Office : AT or NL & Filing date: 1912

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airplane (15) · construction (7) · propulsion (7) · frame (7) · design (6) · Aerodynamics (5) · propellers (5) · Wings (5) · wheels (4) · stability (4) · Chassis (3) · LTA (3) · whole (3) · airship (3) · projectile (3) · parachutes (3) · military (3) · Flapping (3)
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