Drilldown: Patents

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Patents > Grant date: 1800 - 1899 & CPCs : CPC B64C11/48 or CPC B64C39/005

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None (62) · propeller (11) · propulsion (11) · LTA (8) · marine (7) · Churn (6) · navigation (5) · frame (5) · blades (2) · landing (2) · propellers (2) · airplane (2) · parachute (2) · marine propulsion (2) · car (2) · marine propeller (2) · churns (2) · flapping (2)
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