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Patents > Office : ?? or DE or GB & Inventor country: AT & Number of diagram pages: 1

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propulsion (13) · Frame (9) · LTA (7) · design (6) · aerodynamics (6) · airplane (6) · stability (5) · propellers (5) · propeller (5) · hybrid (5) · wings (4) · navigation (4) · flapping (4) · lift (4) · balloon (4) · None (3) · Construction (3) · engine (3) · military (3) · glider (3)
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