Drilldown: Patents

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Patents > IPCs : IPC B64B1/00 or IPC B64C1/26 & Number of text pages: 4

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LTA (29) · navigation (8) · design (6) · airship (6) · construction (5) · balloon (5) · dirigibles (5) · dirigible (5) · frame (3) · balloons (3) · envelope (3) · car (3) · passenger (2) · hybrid (2) · propulsion (2) · military (2) · compartments (2) · safety (2) · stability (2) · ballonet (2)
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