Drilldown: Patents

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Patents > Year granted: 1909 & National tech categories : AT 77d or NL 62

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LTA (8) · airplane (6) · balloon (5) · frame (5) · navigation (4) · Design (3) · Gas (3) · Drachenflieger (3) · airship (3) · car (2) · Balloons (2) · propulsion (2) · Rudder (2) · Wings (2) · Tragfläche (2) · suspension (2) · Control (2)
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