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Patents > Office : DE or GR or US & IPCs : IPC B64B1/00 or IPC B64C25/00 or IPC B64C39/00 & CPCs: CPC B64B1/00 & Number of diagram pages: 1

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LTA (28) · balloon (11) · navigation (9) · propulsion (8) · frame (7) · airship (6) · car (5) · airplane (4) · hybrid (4) · stability (3) · rudder (3) · propeller (3) · design (3) · fabric (3)
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