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Patents > Inventor country: DE & Grant date: 1900 - 1909 & Number of diagram pages: 2-7

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propulsion (9) · LTA (6) · None (5) · navigation (5) · flapping (4) · stability (4) · propeller (4) · hybrid (4) · Design (3) · airplane (3) · frame (3) · marine (3) · ascension (3)
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