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Patents > IPCs : IPC B64B1/40 or IPC B64C35/00 & Number of text pages: 4-6

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hydroaeroplane (8) · construction (8) · LTA (6) · None (4) · airship (4) · control (4) · stability (3) · marine (3) · hydroplane (3) · hydroaeroplanes (3) · design (3) · airplane (3) · captive (2) · Floats (2) · balloon (2) · Hydro-aeroplane (2) · navigation (2) · fuselage (2) · propellers (2) · rudder (2)
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