Drilldown: Patents

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Patents > National tech categories : GB 4 propel & steer or USPC 244/100R & Number of text pages: 1-3

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navigation (9) · LTA (8) · propulsion (7) · airplane (6) · rudder (6) · car (6) · landing (6) · frame (5) · takeoff (5) · wheels (4) · stability (4) · None (4) · subsystem (3) · helicopter (3) · flapping (3) · balloon (3) · jet (3)
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