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Patents > National tech categories : DE 77h.5 or FR 7.3 & Number of figures: 1-2

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airplane (38) · frame (14) · construction (12) · design (12) · None (11) · control (10) · Wings (10) · navigation (9) · Stability (8) · biplane (7) · propeller (5) · fuselage (5) · subsystem (5) · rudder (5) · Tragfläche (4)
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