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Patents > Grant date: 1910 - 1919 & IPCs : IPC B64C33/00 or IPC B64C35/00 & Number of diagram pages: 3-4

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airplane (6) · frame (5) · design (5) · propulsion (4) · hydroplane (3) · construction (3) · hybrid (3) · propellers (2) · airship (2) · hydroaeroplanes (2) · hydroaeroplane (2) · ornithopters (2) · Fuselage (2) · flapping (2) · wings (2) · ornithopter (2)
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