Drilldown: Patents

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Patents > Year filed: 1860 - 1869 & Office: GB & Cites these patents : 1912 or None

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propulsion (10) · LTA (9) · balloon (5) · marine (4) · ornithopter (4) · navigation (4) · frame (4) · dirigible (4) · flapping (3) · takeoff (3) · gas (3) · wings (3)
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