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Patents > Office: AT & Number of text pages: 4-50000000

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Stability (5) · propulsion (4) · airplane (3) · frame (3) · Drachenflieger (2) · gyroscope (2) · helicopter (2) · military (2) · equilibrium (2) · propellers (2) · propeller (2) · Aerodynamics (2) · Tragfläche (2) · balloon (2) · automatic stability (2) · photography (2)
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