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Patents > IPCs: IPC B64C39/00 & First filing: No & Number of diagram pages: 3-6000000

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airplane (13) · propulsion (8) · design (8) · None (5) · stability (5) · Frame (5) · construction (5) · Whole (5) · safety (4) · Propellers (4) · aerodynamics (3) · navigation (3) · airship (3) · parachute (3) · HTA (3)
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