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Patents > Office: DE & CPCs : CPC B64C23/005 or CPC B64C2700/6295 or CPC B64C3/00

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frame (23) · airplane (22) · None (17) · construction (14) · wings (12) · design (8) · biplane (8) · subsystem (5) · fuselage (5) · lift (4) · wing (4) · LTA (4) · airfoil (4) · helicopter (3) · Tragfläche (3) · propeller (3) · metal (3)
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