Drilldown: Patents

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Patents > Year granted: 1922 & Family year: 1910 - 1919 & Number of text pages: 2-3

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propellers (7) · airplane (7) · design (5) · propeller (5) · control (5) · LTA (4) · propulsion (4) · frame (4) · construction (3) · subsystem (3) · stability (3) · military (3)
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