Drilldown: Patents

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Patents > National tech categories : HU V/h or USPC 244/30 & Number of text pages: 5-6

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airplane (16) · Design (9) · propulsion (8) · LTA (7) · whole (6) · Stability (6) · frame (6) · Propellers (6) · Wings (5) · navigation (5) · balloon (5) · lift (4) · automatic stability (4) · propeller (3) · motors (3) · subsystem (3) · safety (3) · Aerodynamics (3) · Construction (3) · car (3)
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