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Patents > IPCs : IPC B64B1/40 or IPC B64C33/00 & Family year: 1909

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flapping (9) · propulsion (8) · LTA (8) · airplane (5) · Airship (5) · design (5) · stability (4) · frame (4) · hybrid (3) · aerostat (3) · propellers (3) · ornithopter (3) · navigation (3) · propeller (2) · ornithopters (2) · wings (2) · Control (2) · construction (2)
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Showing below up to 32 results in range #1 to #32.

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