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Patents > CPCs: CPC B64B1/62 & Number of text pages: 2-3

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LTA (31) · gas (12) · compartments (7) · balloon (7) · balloons (7) · navigation (7) · airship (5) · ballonet (5) · fueling (4) · propulsion (4) · dirigible (4) · safety (4) · hydrogen (4) · Aerostat (4) · subsystem (3) · frame (3)
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