Drilldown: Patents

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Patents > Office: DE & Inventor country : CA or GB or SE

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Tech fields:
None (9) · Airplane (6) · LTA (5) · propeller (5) · stability (5) · navigation (4) · propulsion (4) · frame (4) · dirigible (3) · Subsystem (3) · helicopter (2) · parachute (2) · safety (2) · design (2) · control (2) · Tragfläche (2) · car (2) · balloon (2) · automatic stability (2) · wing (2)
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Citations from after 1930:
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