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Patents > Applicant person : Alfred E. Wunderlich or Everard Richard Calthrop & Grant date: 1910 - 1919

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propellers (8) · parachute (7) · parachutes (6) · propulsion (5) · airplane (5) · balloons (5) · military (3) · suspension (3) · cables (3) · captive (3) · nacelle (3) · LTA (2) · hybrid (2) · frame (2) · rarefaction (2) · control (2) · construction (2) · safety (2) · stability (2)
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