Drilldown: Patents

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Patents > Filing date: 1800 - 1899 & Related to aircraft: 1 & Number of diagram pages: 4-7

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USPC 244/30 (4) · GB 4 motors (3) · USPC 244/26 (2) · USPC 244/64 (2) · GB 4 propel & steer (2) · GB 4 without buoyant (2)
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