Drilldown: Patents

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Patents > CPCs : CPC B60S1/0491 or CPC B64C23/005 & Number of claims: 3

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airplane (18) · propulsion (11) · None (10) · helicopter (8) · hybrid (7) · propeller (7) · stability (6) · navigation (6) · frame (6) · design (5) · lift (4) · wheels (4) · propellers (4) · marine (3) · wings (3) · ascension (3) · whole (3)
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