Drilldown: Patents

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Patents > Filing date: 1909 & National tech categories : DE 77h.5 or USPC 244/26

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Airplane (12) · stability (8) · Tragfläche (6) · design (5) · frame (5) · propeller (4) · helicopter (3) · automatic stability (3) · whole (3) · control (3) · Flugzeug (2) · hybrid (2) · airfoil (2) · LTA (2) · navigation (2) · Construction (2) · Wings (2)
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