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Patents > IPCs : IPC B64C3/52 or None & Number of figures: 24-50

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Airplane (15) · Frame (11) · Propulsion (11) · stability (9) · LTA (6) · safety (6) · propeller (6) · None (5) · propellers (5) · Design (5) · navigation (4) · marine (4) · military (4) · Construction (4) · parachute (4) · hybrid (4) · Whole (4)
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None (9) · HU V/h (3) · USPC 244/119 (3) · DK 77 (2) · DE 77 (2) · USPC 244/113 (2) · USPC 244/109 (2) · USPC 244/131 (2) · FR 6.4 (2) · USPC 244/99.11 (2) · USPC 244/96 (2)
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