Drilldown: Patents

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Patents > IPCs : IPC B64B1/58 or IPC B64B1/62 or IPC B64C33/00 & Citations from after 1930: None & Number of text pages: 3-20000000 & Number of diagram pages: 3-6000000

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frame (7) · flapping (7) · design (6) · airplane (5) · stability (5) · propulsion (5) · ornithopter (5) · wings (4) · navigation (4) · LTA (4) · sustentation (3) · propeller (3) · Lift (3) · Construction (3)
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