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Patents > Office : DE or IN & CPCs : CPC B64C11/006 or CPC B64C3/00

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frame (21) · airplane (20) · None (14) · construction (14) · wings (11) · design (8) · biplane (8) · propulsion (7) · propeller (7) · subsystem (5) · fuselage (5) · wing (4) · metal (3) · Tragfläche (3) · airfoil (3) · lift (3)
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