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Patents > Filing date: 1910 - 1919 & IPCs : IPC B64B1/40 or IPC E04C3/09

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LTA (18) · suspension (8) · stability (8) · nacelle (6) · balloons (5) · Design (5) · construction (4) · Military (4) · cables (4) · balloon (3) · dirigibles (3) · captive (3) · airship (3) · frame (2) · ballonet (2) · ballast (2) · control (2) · gas (2)
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