Drilldown: Patents

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Patents > Grant date: 1920 - 1929 & Patent agent: None & National tech categories: HU V/h

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Airplane (29) · design (15) · construction (14) · Airship (11) · propellers (10) · frame (10) · motors (9) · aerodynamics (9) · wings (8) · biplane (8) · Subsystem (7) · LTA (6) · military (5) · HTA (4) · safety (4)
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None (14)
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