Drilldown: Patents

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Patents > Inventor country: US & Filing date: 1800 - 1899 & Number of text pages: 4-6000000

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None (7) · USPC 244/30 (6) · CA 244/24 (4) · USPC 244/28 (3) · USPC 244/96 (3) · USPC 244/64 (3) · GB 4 framework (2) · USPC 114/21.1 (2) · GB 4 without buoyant (2) · GB 4 propel & steer (2) · GB 4 aëroplanes (2) · USPC 244/151R (2)
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