Drilldown: Patents

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Patents > Grant date: 1914 & IPCs : IPC B64B1/00 or IPC B64B1/58 or IPC B64C25/00 & First filing : Yes or None

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LTA (16) · frame (6) · balloon (4) · envelope (3) · Airship (3) · ballonet (3) · dirigibles (3) · dirigible (3)
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