Drilldown: Patents

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Patents > Tech fields: stability & Filing date: 1800 - 1899 & Citations from after 1930: None

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Inventors:
William Beeson (3) · Perham Wilhelm Nahl (3) · Leonardo Torres Quevedo (2) · Frederick William Zimer (2) · Folacci (2)
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National tech categories:
None (14) · FR 6.3 (7) · DE 77 (5) · GB 4 aëroplanes (4) · GB 4 propel & steer (4) · GB 4 with buoyant (3) · USPC 244/16 (3) · GB 4 aërostats (2) · GB 4 starting (2) · USPC 244/153R (2) · USPC 244/30 (2) · USPC 74/5.22 (2) · GB 4 without buoyant (2) · GB 4 (2)
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