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Patents > IPCs: IPC B64B1/58 & Number of figures: 5-6

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LTA (13) · ballonet (5) · Dirigible (5) · navigation (4) · construction (4) · airship (4) · gas (3) · frame (3) · Dirigibles (2) · balloon (2) · balloons (2) · parachute (2) · design (2) · rudder (2)
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