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Patents > CPCs: CPC B64B1/00 & Number of text pages: 4-30 & Number of diagram pages: 3-5

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LTA (31) · propulsion (15) · navigation (12) · frame (11) · stability (7) · propeller (7) · rudder (6) · None (6) · balloon (6) · design (5) · flapping (5) · marine (4) · construction (4) · Airship (4)
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