Drilldown: Patents

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Patents > IPCs : IPC B64C23/005 or IPC B64C27/04 or IPC B64C35/00 & Citations from after 1930: None & Number of claims: 2

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airplane (12) · design (10) · hydroaeroplane (10) · helicopter (9) · frame (7) · propellers (6) · None (5) · hybrid (5) · hydroplane (5) · construction (4) · marine (4) · buoyancy (4) · takeoff (4) · propulsion (3) · launching (3) · float (3) · ascension (3)
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