Drilldown: Patents

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Patents > Year filed: 1909 & Grant date: 1911 & Number of text pages: 4-5

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airplane (15) · frame (14) · propeller (10) · None (9) · navigation (9) · rudder (8) · stability (8) · wheels (5) · design (4) · car (3) · propulsion (3) · takeoff (3) · flapping (3) · helicopter (3) · hybrid (2) · Whole (2) · lift (2) · landing (2) · automatic stability (2) · construction (2)
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