Drilldown: Patents

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Patents > National tech categories : AT 77d or USPC 244/20 & Number of figures: 8-30

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propulsion (11) · Airplane (10) · frame (9) · wings (8) · propeller (8) · stability (7) · navigation (7) · flapping (7) · Design (5) · helicopter (5) · None (4) · aerodynamics (4) · whole (4) · LTA (4) · subsystem (3) · HTA (3)
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