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Patents > National tech categories : DE 77h.10 or FR 6.4 & IPCs: IPC B64C33/00

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flapping (13) · ornithopter (7) · propulsion (7) · wings (6) · Lift (5) · design (5) · airplane (4) · stability (4) · frame (3) · hybrid (3) · Orthopter (2) · flying machine (2) · Construction (2) · navigation (2) · cables (2) · subsystem (2) · sustentation (2) · toy (2) · whole (2) · heavier-than-air (2)
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Showing below up to 33 results in range #1 to #33.

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