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1883: Soyer & Fils, mécaniciens, 139 rue du Chemin-Vert
1900: F. Soyer, 80-84 Rue des Pyrenees, Paris
F. Soyer was presumably the successor to Soyer et Fils. Both firms made chain pumps (pompes a chapelet).
The remains of two chain pumps by Soyer & Fils may be seen alongside the Rue de Crimee Lifting Bridge (Paris).