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Patents > CPCs: CPC B64C2700/6281 & Number of text pages: 3-70

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None (2) · Édouard-Jean Bigourdan (2) · Travers Glynn Ivon Ayers (2) · Peter Pitcairn Carmichael (2) · Jesse James Dillon (2) · William Everett Sylvester Coyne (2) · Alexis Beurrier (2)
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None (2) · Alexis Beurrier (2) · Travers Glynn Ivon Ayers (2) · Peter Pitcairn Carmichael (2) · Jesse James Dillon (2) · Édouard-Jean Bigourdan (2)
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helicopter (25) · propulsion (8) · Propellers (8) · airplane (8) · None (7) · design (7) · hybrid (7) · Ascension (6) · wheels (4) · stability (4) · HTA (3) · control (3) · Frame (3) · heavier-than-air (3) · propeller (3)
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