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Patents > Filing date: December 1908 & National tech categories: FR 6.4 & Citations from after 1930: None

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airplane (14) · Design (12) · propulsion (8) · LTA (8) · stability (6) · Frame (6) · wings (5) · Propellers (5) · navigation (5) · Sustentation (4) · Aerodynamics (4) · Lift (4) · dirigible (4) · Subsystem (3) · Rudder (3) · equilibrium (3) · None (3) · Ascension (3)
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Showing below up to 35 results in range #1 to #35.

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