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Patents > Office: CH & Inventor country : AT or CH or NL

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Tech fields:
airplane (14) · LTA (14) · propeller (12) · frame (12) · propulsion (10) · design (8) · subsystem (8) · navigation (8) · whole (7) · stability (7) · balloon (5) · None (4) · dirigible (4) · rigid (3) · heavier-than-air (3) · flapping (3) · Wings (3) · cables (3) · car (3) · airfoil (3)
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Citations from after 1930:
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Showing below up to 47 results in range #1 to #47.

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