Drilldown: Patents

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Patents > Filing date: 1890 & Granted: Yes & Citations from after 1930: None

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LTA (17) · balloon (10) · None (9) · propulsion (9) · frame (7) · propeller (6) · subsystem (4) · navigation (4) · ascension (3) · toy (3) · whole (3) · piloting (3) · compartments (3) · parachute (3) · motor (3) · airfoil (3)
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