Drilldown: Patents

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Patents > Year granted: 1912 & Supplementary to patent: None & CPCs: CPC B64B1/00

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None (15) · LTA (14) · balloon (7) · frame (6) · airship (5) · navigation (5) · construction (5) · dirigible (5) · propulsion (4) · propeller (3) · hybrid (3) · fabric (2) · parachute (2) · wings (2) · car (2) · design (2)
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