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Patents > IPCs: IPC B64B1/00 & Number of figures: 14-30

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LTA (14) · navigation (5) · compartments (4) · balloon (4) · frame (4) · propulsion (3) · safety (3) · landing (3) · dirigibles (3) · ballonet (2) · design (2) · dirigible (2) · rigid (2) · propeller (2) · airship (2) · hybrid (2) · marine (2)
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