Drilldown: Patents

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Patents > Year granted: 1910 - 1919 & Number of text pages: 5-30 & Number of figures: None

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None (6) · stability (5) · airplane (5) · frame (5) · propeller (4) · LTA (4) · navigation (4) · balloon (3) · design (3) · automatic stability (2) · ballonet (2) · helicopter (2) · airfoil (2) · landing (2) · Propulsion (2) · parachute (2) · gas (2) · safety (2)
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