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Patents > IPCs : IPC B64B1/40 or IPC B64D33/10 & Number of claims: 2-4

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LTA (18) · design (9) · construction (8) · balloon (7) · stability (7) · suspension (5) · airship (4) · frame (4) · car (4) · captive (3) · navigation (3) · Nacelle (3) · airplane (3)
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