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US Patent: 1,346,304
Micrometer
Patentee: Augustus F. Donaldson (exact or similar names) - Toledo, OH USPTO Classifications: 33/803 Tool Categories: metalworking tools : machinist tools : measuring tools : micrometers Assignees: Bunting Brass & Bronze Co. - Toledo, OH Manufacturer: Not known to have been produced Witnesses: none listed	Patent Dates: Applied: Jan. 26, 1917 Granted: Jul. 13, 1920 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens
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