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US Patent: 2,881,529
Internal Diameter Micrometer
Patentee: Pierre Marcel Roch (exact or similar names) - Rolle, Switzerland USPTO Classifications: 33/542, 33/544.6 Tool Categories: metalworking tools : machinist tools : measuring tools : micrometers Assignees: Pierre Roch S.a.r.l. - Rolle, Switzerland Manufacturer: Not known to have been produced Witnesses: none listed	Patent Dates: Applied: Dec. 13, 1954 Granted: Apr. 14, 1959 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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