Drilldown: Patents

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Patents > National tech categories : USPC 244/30 or USPC 244/80 & Number of text pages: 4-5

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LTA (12) · stability (10) · navigation (8) · frame (7) · Airplane (6) · propulsion (6) · rudder (5) · propeller (5) · balloon (4) · car (4) · safety (3) · takeoff (3) · Lift (2) · landing (2) · equilibrium (2) · control (2) · automatic stability (2) · wheels (2) · Whole (2) · parachute (2)
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