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Patents > IPCs : IPC B64C35/00 or IPC B64D27/00 & Number of claims: 4-6

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hydroaeroplane (13) · None (10) · marine (6) · design (5) · control (5) · construction (3) · hydroplane (3) · airplane (3) · frame (3) · aerodynamics (3) · buoyancy (3)
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