Drilldown: Patents

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Patents > Inventor country : DE or FR or RU or US & Full specification filed date: 1890 - 1899

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LTA (10) · navigation (8) · propeller (7) · balloon (6) · frame (5) · propulsion (4) · rudder (3) · hybrid (3) · design (3) · compartments (3) · car (3) · airplane (3)
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