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Patents > CPCs : CPC B64C2700/6218 or CPC B64C39/00 or IPC H03G5/20

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None (673) · Seine (9) · Paris (7) · Eure (3) · St. Louis (3) · London (3) · Loire (2) · Seine-et-Oise (2) · Nièvre (2) · County of London (2) · Missouri (2) · Var (2) · Guérigny (2)
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None (507) · Patent FR-1910-435648 (3) · Patent US-1910-996592 (3) · Patent DE-1911-11-16 Otto Albin Budig (3)
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None (277) · None (38) · Armengaud jeune (26) · Marks & Clerk (13) · J. Bonnet-Thirion (13) · E. Blétry (13) · Brandon freres (11) · Weismann et Marx (9) · Lavoix et Mosès (9) · J. Germain (8) · Charles Dony (8) · Boult, Wade & Tennant (8) · Borame et Julien (7) · Schwab (7) · Charles Assi (7) · Y. Rabilloud et fils (7) · G. Petiau (6) · L. Chassevent (6) · P. Follin (6) · Chassevent (6)
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