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US Patent: 1,511,255
Micrometer
Patentee: Joseph E. Barker (exact or similar names) - Denver, CO USPTO Classifications: 33/821, 33/827 Tool Categories: metalworking tools : machinist tools : measuring tools : micrometers Assignees: None Manufacturer: Not known to have been produced Witnesses: none listed	Patent Dates: Applied: Aug. 07, 1922 Granted: Oct. 14, 1924 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens
Description: A. G. O'Brien - patent attorney

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