Drilldown: Patents

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Patents > Family year: 1870 - 1879 & Number of figures: 4-8

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propulsion (11) · LTA (10) · propeller (7) · navigation (5) · marine (4) · kite (3) · landing (3) · None (3) · car (3) · airplane (3)
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None (10) · USPC 244/153R (3)
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