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Patents > National tech categories: FR 6.4 & IPCs : IPC A63H27/10 or IPC B64C3/54

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airplane (29) · wings (16) · design (13) · lift (12) · sustentation (9) · construction (8) · frame (8) · aerodynamics (7) · None (7) · stability (6) · Control (5) · Rudder (4) · wing warping (4) · monoplane (4) · Steering (3)
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None (2)
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Showing below up to 41 results in range #1 to #41.

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