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Patents > Patent agent: None & CPCs: CPC B64B1/00 & Number of text pages: 2

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LTA (28) · propulsion (13) · balloon (12) · frame (11) · navigation (10) · dirigible (6) · Hybrid (5) · design (5) · aerostat (5) · stability (5) · propeller (5) · wings (4) · airship (4) · balloons (4)
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