Drilldown: Patents

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Patents > Office : BE or CA & Filing date: 1800 - 1899

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LTA (16) · propulsion (11) · frame (8) · balloon (7) · navigation (5) · propeller (4) · motors (4) · compartments (3) · rudder (3) · gas (3) · flapping (3) · cargo (2) · car (2) · aerostat (2) · kite (2) · hybrid (2) · human-powered (2) · jet (2)
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