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Patents > Inventor country: BE & Grant date: 1900 - 1999 & Number of figures: 8-50000000

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airplane (15) · Propellers (10) · propulsion (9) · control (7) · steering (6) · LTA (5) · Subsystem (4) · navigation (4) · hybrid (4) · wings (3) · rarefaction (3) · design (3) · aerodynamics (3)
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