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Patents > IPCs : IPC B64C23/00 or IPC E04C3/16 & Number of figures: 8-11

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None (8) · airplane (7) · propulsion (4) · ascension (4) · Hybrid (4) · frame (3) · heavier-than-air (3) · propellers (3) · HTA (3) · Design (3) · Sustentation (3) · Balloons (2) · helicopter (2) · Lift (2) · Takeoff (2) · whole (2) · Parachutes (2)
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Showing below up to 28 results in range #1 to #28.

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