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Patents > CPCs : CPC B64B1/58 or CPC B64D17/78 & Number of claims: 7-20

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LTA (10) · stability (5) · fabric (4) · ballonet (4) · construction (3) · gas (3) · car (3) · hybrid (3) · balloon (3) · texture (3) · airplane (3) · navigation (3)
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