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Patents > Year granted: 1919 & Supplementary to patent: None & National tech categories: FR 6.4

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None (7) · Émile Letord (4) · Jules Védrines (3) · Louis-Léon Astoux (3) · Georges-Henri-Marius Canton (2) · Alfred John Macy (2) · Henri-Joseph-Léon-Marie de la Chevardière de la Grandville (2) · François-Philippe-Armand Rousseau (2) · Clément Galvin (2) · René-Joseph-Ghislain Straunard (2) · René Caudron (2)
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None (7) · Émile Letord (4) · Jules Védrines (3) · Louis-Léon Astoux (3) · René-Joseph-Ghislain Straunard (2) · Alfred John Macy (2) · Henri-Joseph-Léon-Marie de la Chevardière de la Grandville (2) · Georges-Henri-Marius Canton (2) · François-Philippe-Armand Rousseau (2) · Clément Galvin (2) · René Caudron (2)
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None (5)
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IPCs:
IPC B64C3/00 (8) · IPC B64C1/00 (8) · IPC B64C17/00 (7) · IPC B64C23/00 (6) · IPC B64C35/00 (4) · IPC B64C33/02 (4) · IPC B64C3/18 (4) · IPC B64C27/04 (3) · None (3) · IPC B64C11/00 (3) · IPC B64C13/12 (2) · IPC B64C33/00 (2) · IPC B64C39/00 (2) · IPC B64C17/06 (2) · IPC B64C3/38 (2) · IPC B64C1/06 (2) · IPC B64B1/62 (2) · IPC B64C13/00 (2)
CPCs:
CPC B64C3/00 (8) · CPC B64C17/00 (7) · CPC B64C23/005 (6) · CPC B64C2700/6235 (5) · CPC B64C2700/6274 (5) · CPC B64C33/02 (5) · CPC B64C2700/6218 (4) · CPC B64C35/00 (4) · CPC B64C2001/0063 (3) · CPC B64C39/00 (3) · CPC B64C2700/6256 (3) · CPC B64C13/00 (3)
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