Drilldown: Patents

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Patents > Applicant firm: None & Full specification filed date: 1890 - 1899 & Number of figures: 5-30

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navigation (10) · propulsion (9) · frame (8) · LTA (7) · propeller (7) · balloon (4) · rudder (3) · flapping (3) · human-powered (3) · hybrid (3) · heavier-than-air (3) · airplane (3)
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