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Patents > Publication date: 1913 & IPCs : IPC B64C11/00 or IPC B64C3/18 or IPC B64C31/06 or IPC B64C39/00

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airplane (14) · design (11) · propulsion (10) · Aerodynamics (9) · None (6) · propellers (5) · frame (5) · construction (5) · Subsystem (3) · HTA (3) · fuselage (3) · wings (3) · airship (3) · control (2) · navigation (2) · industry (2) · whole (2)
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