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Patents > Filing date: 1908 & Grant date: 1910 & Number of text pages: 1-3

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propulsion (12) · LTA (9) · propeller (8) · frame (8) · landing (4) · gas (4) · flapping (4) · stability (4) · Design (3) · nacelle (3) · ornithopter (3) · motor (3) · None (3) · takeoff (3) · airfoil (3) · Airplane (3)
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