Drilldown: Patents

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Patents > Office : DE or GB & Filing date: 1897 & Grant date: 1800 - 1899

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navigation (11) · propulsion (10) · frame (7) · LTA (7) · propeller (7) · wings (5) · rudder (5) · flapping (4) · captive (4) · hybrid (3) · electricity (3) · kite (3) · airplane (3) · balloon (3) · stability (3)
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Showing below up to 34 results in range #1 to #34.

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