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| Patents for Pierre Marcel Roch | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,881,529 | Apr. 14, 1959 | P.M. Roch | Internal Diameter Micrometer | micrometers | |
| 2,963,792 | Dec. 13, 1960 | P.M. Roch | Micrometric Head | measurement gauges | |