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Patents > IPCs : IPC B64B1/40 or IPC B64C33/00 & Number of text pages: 4-50000000

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LTA (8) · stability (8) · wings (7) · flapping (7) · ornithopter (7) · design (7) · control (5) · HTA (5) · Airship (5) · propulsion (4) · navigation (4) · airplane (4) · balloon (4)
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