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US Patent: 1,100,573
Micrometer
Patentee: Walter L. Keefer (exact or similar names) - Fitchburg, Worcester County, MA USPTO Classifications: 33/802 Tool Categories: metalworking tools : machinist tools : measuring tools : micrometers Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jun. 23, 1913 Granted: Jun. 16, 1914 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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