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Patents > Inventor country: DE & Citations from after 1930: None & Number of figures: 12-17

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LTA (10) · airplane (9) · propulsion (7) · None (7) · navigation (6) · airship (4) · stability (4) · balloon (3) · wings (3) · sustentation (3) · aerodynamics (3) · flapping (3) · frame (3) · lift (3)
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