Drilldown: Patents

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Patents > Inventor country : AT or DE & Filing date: 1880 - 1889

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LTA (24) · propulsion (16) · None (13) · balloon (7) · control (7) · navigation (6) · airship (4) · marine (3) · propeller (3) · frame (2) · flapping (2) · electricity (2) · ornithopter (2) · steering (2) · steam (2) · whole (2)
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