Drilldown: Patents

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Patents > Year filed: 1910 - 1919 & Grant date: 1900 - 1999 & Granted: None

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Airplane (13) · parachute (6) · LTA (6) · Propellers (5) · navigation (4) · frame (3) · military (3) · stability (3) · hydroaeroplane (3) · propulsion (3) · helicopter (3) · marine (2) · hydroplane (2) · landing (2) · safety (2) · propeller (2) · ascension (2)
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