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Patents > IPCs : IPC B64C27/04 or IPC B64C39/00 & Number of figures: 12-16

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airplane (11) · control (6) · None (5) · stability (4) · Propulsion (4) · aerodynamics (4) · wings (4) · Lift (3) · sustentation (3) · propellers (3) · navigation (3) · HTA (3) · helicopter (2) · aileron (2) · ascension (2) · construction (2) · design (2) · multiplane (2) · flapping (2)
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