Drilldown: Patents

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Patents > Year filed: 1907 & Number of text pages: 3-9 & Number of diagram pages: 2

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propulsion (13) · propellers (5) · propeller (5) · navigation (5) · LTA (5) · flapping (4) · rudder (4) · marine (4) · None (3) · stability (3) · ornithopter (3) · frame (3) · wings (3) · Design (2) · airfoil (2) · helicopter (2) · hybrid (2) · balloon (2) · airplane (2) · car (2)
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