Drilldown: Patents

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Patents > IPCs: None & CPCs: CPC B64C23/005 & Number of text pages: 4-6000000

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airplane (14) · frame (12) · propeller (10) · None (8) · helicopter (8) · navigation (8) · propulsion (8) · stability (8) · takeoff (6) · rudder (5) · hybrid (5) · car (3) · wheels (3)
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