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Patents > IPCs: IPC B64B1/62 & CPCs: CPC B64B1/62 & Citations from after 1930: None

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LTA (45) · gas (16) · navigation (10) · balloon (9) · ballonet (8) · balloons (6) · safety (5) · Compartments (5) · hydrogen (5) · Airship (5) · Propulsion (5) · subsystem (4) · Construction (4) · lift (4) · Aerostat (4) · Dirigibles (4)
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None (10)
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