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Patents > Inventor country: DE & CPCs : CPC B64C2700/6235 or CPC B64C33/00

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construction (11) · frame (11) · None (10) · airplane (9) · biplane (6) · design (5) · wings (5) · fuselage (4) · flapping (3) · propulsion (2) · motors (2) · control (2) · ornithopter (2)
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