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Patents > Office: DE & Inventor country: AT

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Tech fields:
propulsion (8) · LTA (6) · None (5) · engine (4) · airplane (4) · balloon (4) · propeller (3) · aerodynamics (3) · control (3) · wing (2) · Tragfläche (2) · propellers (2) · paddle-wheel (2) · military (2) · ICE (2) · frame (2) · marine (2)
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Citations from after 1930:
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Showing below up to 33 results in range #1 to #33.

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