Drilldown: Patents

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Patents > Grant date: 1922 & Related to aircraft: Other & Number of text pages: 2

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airplane (10) · Propellers (7) · propeller (7) · frame (7) · construction (5) · design (5) · propulsion (4) · military (4) · wings (3) · safety (3) · aerial propeller (3) · None (2) · stability (2) · LTA (2) · wood (2) · aerodynamics (2) · car (2) · biplane (2)
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