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Patents > Application number: None & Publication date: 1921

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airplane (13) · design (7) · subsystem (7) · military (7) · propellers (7) · frame (6) · sensors (6) · propeller (5) · propulsion (5) · parachutes (4) · aerodynamics (4) · wing (3) · industry (3) · construction (3) · stability (3)
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None (14) · CPC G01S1/72 (6) · CPC B64D7/02 (3) · CPC B64C3/00 (2) · CPC B64D17/80 (2)
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