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Patents > Year granted: 1911 & Inventor country : AT or NL

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airplane (18) · Design (11) · Frame (9) · Wings (8) · Construction (8) · propellers (7) · stability (7) · whole (7) · Subsystem (5) · propulsion (5) · propeller (5) · navigation (5) · LTA (5) · lift (5) · steering (4) · sustentation (4)
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