Drilldown: Patents

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Patents > Inventor country : ES or RO & Patent agent: None & Citations from after 1930: None

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LTA (18) · balloon (11) · navigation (10) · None (9) · aerodynamics (9) · propulsion (7) · Airplane (6) · Propellers (5) · design (4) · frame (3) · rudder (3) · braking (3) · subsystem (3) · hydrogen (3)
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Showing below up to 47 results in range #1 to #47.

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