Drilldown: Patents

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Patents > Year filed: 1880 - 1889 & Tech fields : marine or whole

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GB 4 with buoyant (9) · None (5) · DE 77 (4) · USPC 244/28 (2) · USPC 244/30 (2) · GB 4 aëroplanes (2) · GB 4 aërostats (2) · GB 4 parachutes (2) · USPC 114/21.1 (2)
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