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Patents > Office : DK or IN or SU or US & Inventor country : CA or GB or NL & Citations from after 1930: None & Number of diagram pages: 2-3

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propeller (9) · stability (8) · propulsion (8) · frame (7) · navigation (7) · airplane (6) · rudder (4) · design (4) · marine (3) · parachute (3) · hydroaeroplane (3) · control (3) · LTA (2) · hydroplane (2) · helicopter (2) · wings (2) · safety (2) · dirigible (2) · steering (2) · aerodynamics (2)
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