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Patents > Publication date: June 1909 & National tech categories : FR 6.4 or USPC 244/6

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None (2) · Jean-Baptiste-Eugène Gangler (2) · Martinus Sieveking (2)
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None (3) · Jean-Baptiste-Eugène Gangler (2) · Martinus Sieveking (2)
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Airplane (15) · None (7) · LTA (7) · propellers (7) · design (7) · frame (6) · propulsion (6) · construction (6) · wings (6) · navigation (5) · Control (5) · stability (5) · aerial propeller (4) · hybrid (3) · helicopter (3) · Airship (3) · sustentation (3) · automatic stability (3) · Subsystem (3)
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