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Patents > CPCs: CPC B64B1/00 & Number of text pages: 6-40

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LTA (24) · propulsion (11) · frame (8) · navigation (8) · balloon (8) · marine (7) · propeller (7) · cargo (5) · safety (5) · design (4) · None (4) · hybrid (4) · Airship (4) · flapping (3) · car (3) · passenger (3) · compartments (3) · landing (3) · propellers (3) · airplane (3)
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