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Patents > National tech categories: CH 129b & CPCs: None & Number of diagram pages: 2-3

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airplane (14) · design (8) · frame (8) · wings (5) · whole (5) · stability (5) · propellers (4) · automatic stability (3) · safety (3) · construction (3) · control (3) · navigation (3) · Lift (3) · landing (2) · wheels (2) · parachute (2) · None (2) · equilibrium (2) · monoplane (2)
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