Drilldown: Patents

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Patents > Family year: 1870 - 1879 & Number of text pages: 2

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propulsion (11) · LTA (11) · human-powered (5) · propeller (5) · navigation (5) · marine (5) · flapping (4) · None (3) · balloon (3) · car (3) · projectile (3) · military (3) · rudder (2) · parachute (2) · Airplane (2) · hybrid (2) · landing (2) · frame (2) · gas (2)
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None (7) · DE 77 (6) · USPC 244/3.23 (2)
CPCs:
None (2) · CPC B64B1/58 (2) · CPC B64C27/54 (2) · CPC F03D11/00 (2) · CPC F42B10/30 (2) · CPC B64C39/005 (2) · CPC B64B1/40 (2) · CPC B64B1/00 (2) · CPC Y02E10/722 (2)
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