Drilldown: Patents

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Patents > Year filed: 1908 & Applicant type : COMPANY+INDIV or INDIV & Applicant is inventor: Yes & CPCs: CPC B64C23/005

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propulsion (12) · airplane (9) · propeller (8) · Frame (7) · helicopter (7) · None (5) · navigation (5) · Hybrid (5) · takeoff (4) · stability (4) · ascension (4) · Control (3) · Propellers (3) · design (3)
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