Drilldown: Patents

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Patents > Office: BE & Inventor country : DE or RU or None & CPCs: None

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airplane (15) · propellers (9) · wings (7) · LTA (7) · design (7) · control (6) · stability (6) · propulsion (5) · aerodynamics (4) · human-powered (3) · HTA (3) · frame (3) · flapping (3) · rudder (3)
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Showing below up to 38 results in range #1 to #38.

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