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Patents > CPCs : CPC B64C2001/0063 or CPC B64C2700/6295 & Citations from after 1930: None

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None (437) · Patent DE-1912-265515 (2) · Patent US-1911-994106 (2) · Patent NZ-1909-26981 (2) · Patent FR-1916-502839 (2) · Patent FR-1913-461629 (2) · Patent FR-1910-421136 (2) · Patent FR-1909-421311 (2) · Patent FR-1909-395148 (2) · Patent FR-1912-441089 (2)
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None (311) · Armengaud jeune (11) · None (10) · Weismann et Marx (7) · J. Germain (7) · Marks & Clerk (6) · Charles Dony (5) · J. Bonnet-Thirion (4) · Hyde & Heide (4) · G. Petiau (4) · Chassevent (4) · Charles Assi (4) · Brandon frères (4) · Y. Rabilloud et fils (4)
National tech categories:
None (277) · FR 6.4 (140) · USPC 244/13 (21) · USPC 244/45R (17) · USPC 244/91 (7) · USPC 244/90R (7) · USPC 244/87 (6) · USPC 244/119 (4) · DE 77h.5 (4) · USPC 244/48 (3) · FR 6.3 (3) · USPC 244/233 (3) · USPC 244/139 (3)
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