Drilldown: Patents

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Patents > Year granted: 1919 & Supplementary to patent: None & National tech categories: AT 77d

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airplane (17) · Design (5) · wings (5) · biplane (5) · Frame (5) · military (4) · Propellers (4) · LTA (4) · construction (3) · HTA (3) · aerodynamics (3) · propulsion (2) · airship (2) · cooling (2) · subsystem (2) · radiator (2) · Flugzeug (2) · fuselage (2) · Tragfläche (2) · helicopter (2)
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