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Patents > CPCs: CPC B64C23/005 & Number of text pages: 3-5 & Number of figures: 4-6

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Albert John Fortescue (2)
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Albert John Fortescue (2)
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airplane (12) · None (12) · propulsion (9) · helicopter (9) · propellers (6) · hybrid (6) · frame (6) · sustentation (5) · ascension (5) · design (4) · stability (4) · wings (4) · navigation (3) · whole (3) · descent (3) · aerodynamics (3) · parachutes (3) · safety (3) · propeller (3)
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