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Patents > Inventor country: DE & Application number: None & Publication date: 1920

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airplane (19) · frame (7) · construction (6) · design (6) · projectile (5) · military (4) · propeller (4) · safety (3) · Instrument (3) · LTA (3) · Texture (3) · Fuselage (3) · biplane (3) · navigation (3) · Parachutes (3) · wings (3) · aerodynamics (3)
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