Drilldown: Patents

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Patents > Publication date: 1920 - 1929 & National tech categories : AT 77d or None & Number of text pages: 1-2

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airplane (14) · frame (5) · design (4) · stability (4) · military (4) · None (3) · subsystem (3) · propulsion (3) · propellers (3) · parachutes (3) · LTA (3) · engine (3) · electricity (3) · wings (3) · construction (3) · control (3)
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