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Patents > Office : ?? or DE & CPCs : CPC B64C23/005 or CPC B64C3/00 & Number of diagram pages: 1

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frame (18) · airplane (17) · wings (11) · construction (11) · biplane (7) · design (7) · subsystem (5) · fuselage (5) · wing (4) · lift (4) · None (4) · propeller (3) · airfoil (3) · metal (3) · Tragfläche (3)
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