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Patents > Patent agent: Schwab & National tech categories: FR 6.4 & Number of text pages: 3-11

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airplane (12) · stability (9) · Propellers (5) · control (5) · LTA (4) · propulsion (4) · None (3) · hybrid (3) · sustentation (3) · gyroscope (3) · design (3) · flapping (3) · HTA (2) · frame (2) · navigation (2) · elevation (2) · dirigible (2) · construction (2) · takeoff (2) · automatic stability (2)
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