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Patents > National tech categories: FR 6.4 & CPCs: CPC B64C3/385 & Number of claims: 3-7

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airplane (17) · None (10) · design (9) · control (7) · sustentation (5) · stability (5) · aerodynamics (5) · Wings (5) · landing (4) · Frame (4) · fuselage (4) · Lift (4) · biplane (3) · Elasticity (3) · construction (3) · incidence (2) · automatic stability (2) · wing warping (2) · Subsystem (2)
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