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Patents > Filing date: 1897 & Grant date: 1890 - 1899 & Number of diagram pages: 2-7

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propulsion (7) · LTA (6) · frame (6) · navigation (5) · flapping (4) · wings (3) · stability (3) · rudder (3) · propeller (3) · hybrid (3) · car (3) · None (2) · airplane (2) · human-powered (2) · balloon (2) · heavier-than-air (2) · electricity (2) · design (2)
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