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Patents > IPCs : IPC B64C3/50 or IPC B64C39/00 & Number of figures: 9-10

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None (10) · airplane (9) · stability (6) · design (6) · construction (5) · propulsion (5) · Wings (5) · lift (4) · frame (4) · Propellers (4) · navigation (4) · marine (4) · propeller (3) · LTA (3) · hybrid (3)
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