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Patents > IPCs: IPC B64C33/00 & First filing : No or Yes & Number of diagram pages: 3-20000000

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flapping (12) · ornithopter (11) · frame (8) · wings (6) · airplane (6) · propulsion (6) · stability (5) · design (5) · Lift (4) · sustentation (3) · propeller (3) · navigation (3) · HTA (3) · hybrid (3) · human-powered (2) · subsystem (2) · airfoil (2) · cables (2) · rudder (2) · ornithopters (2)
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