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Patents > IPCs : IPC B64C3/54 or IPC B64C33/00 & Citations from after 1930: None & Number of figures: 2-4

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airplane (18) · design (13) · Wings (11) · frame (9) · Lift (7) · aerodynamics (7) · flapping (7) · rudder (6) · Control (6) · sustentation (5) · Steering (4) · stability (4) · propulsion (4) · ornithopter (4) · None (4) · navigation (3) · Construction (3)
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Showing below up to 33 results in range #1 to #33.

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