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Patents > IPCs : IPC B64C 3/38 or IPC B64C23/00 & Number of diagram pages: 3-5

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Airplane (10) · Design (8) · None (7) · Propellers (6) · Ascension (5) · Hybrid (5) · frame (5) · wings (5) · stability (3) · Whole (3) · Helicopter (3) · Propulsion (3) · sustentation (2) · navigation (2) · heavier-than-air (2) · HTA (2) · Takeoff (2) · Control (2) · Construction (2) · compartments (2)
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