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Patents > IPCs : IPC B64C1/08 or IPC B64C39/00 & Number of figures: 17-40

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airplane (13) · design (8) · wings (6) · propellers (6) · None (5) · aerodynamics (5) · propulsion (5) · construction (5) · stability (4) · Whole (3) · rudder (3) · navigation (3) · frame (3) · lift (3)
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