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Patents > National tech categories: FR 6.4 & CPCs: CPC B64C23/005 & Number of text pages: 2

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Airplane (18) · hybrid (13) · helicopter (11) · Design (9) · propulsion (9) · None (7) · ascension (7) · Propellers (6) · Frame (5) · control (4) · construction (4) · Cables (4) · wings (4) · heavier-than-air (4) · Steering (3) · Lift (3) · takeoff (3)
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Showing below up to 36 results in range #1 to #36.

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