Drilldown: Patents

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Patents > Year granted: 1902 & Publication date: 1900 - 1999 & Supplementary to patent: None & Citations from after 1930: None

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propulsion (20) · LTA (13) · propellers (11) · navigation (7) · balloon (7) · Airship (6) · lift (5) · subsystem (5) · dirigible (5) · ascension (4) · construction (4) · steering (3) · Balloons (3) · frame (3) · Hybrid (3) · propeller (3) · kite (3)
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