Drilldown: Patents

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Patents > National tech categories : BE K or FR 6.3 or USPC 244/30 & Cites these patents : 1 or 1913 or None & Citations from after 1930: None & Number of text pages: 1-2 & Number of claims: None

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LTA (13) · propulsion (11) · navigation (11) · aerostat (9) · balloon (9) · airplane (8) · sustentation (4) · ascension (4) · transmission (3) · stability (3) · safety (3) · frame (3) · electricity (3) · propeller (3) · dirigible (3)
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Showing below up to 31 results in range #1 to #31.

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