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Patents > Grant date: 1909 & National tech categories : FR 6.3 or HU V/h

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airplane (8) · Design (8) · subsystem (6) · Propulsion (5) · Steering (4) · Control (4) · Propellers (4) · Wings (3) · Whole (3) · rudder (3) · frame (3) · aerodynamics (3) · Lift (2) · Sustentation (2) · motors (2) · LTA (2) · Construction (2) · Airship (2) · Flapping (2)
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