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Patents > IPCs: IPC B64C39/00 & Number of text pages: 6-50 & Number of figures: 8-40

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airplane (16) · design (8) · propellers (6) · lift (6) · propulsion (6) · frame (6) · construction (6) · stability (5) · HTA (5) · None (4) · aerodynamics (4) · wings (4) · hybrid (3) · flapping (3) · navigation (3) · biplane (3)
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