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Patents > IPCs : IPC B64C33/00 or IPC B64C35/00 & Number of diagram pages: 3

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flapping (8) · airplane (7) · ornithopter (6) · frame (5) · propulsion (5) · design (4) · Hybrid (4) · construction (4) · fuselage (3) · stability (3) · Hydroplane (2) · hydroaeroplanes (2) · hydroaeroplane (2)
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