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Patents > Filing date: 1910 - 1919 & IPCs : IPC B64B1/40 or IPC B64C27/18

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LTA (19) · stability (9) · suspension (8) · nacelle (6) · Design (6) · balloons (5) · cables (4) · Construction (4) · Military (4) · balloon (3) · captive (3) · airship (3) · dirigibles (3) · Helicopter (3)
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