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Patents > Office : DE or SE & National tech categories: DE 77h.5 & Number of claims: 2

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airplane (19) · frame (10) · Construction (9) · design (7) · control (5) · None (4) · propulsion (4) · wings (4) · biplane (4) · airfoil (3) · military (3) · propeller (3) · subsystem (3) · Tragfläche (3) · Aerodynamics (3)
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