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Patents > Grant date: 1914 & CPCs: CPC B64B1/00

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LTA (27) · Frame (13) · None (8) · dirigibles (6) · airship (6) · dirigible (5) · ballonet (5) · compartments (5) · rigid (5) · Design (5) · safety (4) · balloon (4) · military (4) · gas (4) · balloons (3)
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