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Patents > Inventor location : Budapest or Pennsylvania & Number of diagram pages: 2-50000000

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stability (11) · airplane (11) · propulsion (8) · propeller (6) · frame (5) · steering (5) · automatic stability (5) · navigation (5) · design (5) · lift (4) · whole (3) · HTA (3) · gyroscope (3) · None (3) · Wings (3) · control (3)
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