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Patents > CPCs: CPC B64B1/00 & Family year: 1913 & First filing: Yes

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LTA (19) · None (17) · Frame (8) · compartments (6) · Airship (6) · dirigibles (6) · ballonet (5) · design (5) · balloon (4) · suspension (3) · propulsion (3) · safety (3) · rigid (3) · gas (3)
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