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| Patents for L'Air Liquid, Societe Anonyme pour I'Etudes et I'Exploitation des Procedes Georges Claude | |||||
| Number | Date | Patentee | Title | Type | |
| 2,808,255 | Oct. 01, 1957 | G. Darcy | Rotatable Tool Holder for Machining Cylindrical Members | metalworking machine tool holders | |