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Patents > Inventor country : DE or RU & National tech categories: AT 77d & Number of claims: 1-2

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airplane (15) · LTA (14) · Design (11) · Airship (10) · Construction (10) · frame (8) · propulsion (7) · Stability (7) · Wings (5) · Aerodynamics (5) · subsystem (5) · whole (5) · fuselage (4) · Propellers (4) · propeller (4) · wheels (3) · lift (3) · chassis (3) · flapping (3)
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