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Patents > CPCs: CPC B64B1/58 & Number of text pages: 2-6 & Number of claims: 6-14

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LTA (13) · gas (4) · airplane (4) · navigation (4) · ballonet (4) · stability (4) · car (4) · dirigible (4) · hybrid (3) · propeller (3) · balloon (3) · fabric (3) · propulsion (3)
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