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US Patent: 1,922,758
Micrometer Depth Gauge
Patentee: Knute Christopherson (exact or similar names) - Minneapolis, Hennepin County, MN USPTO Classifications: 33/544 Tool Categories: metalworking tools : machinist tools : measuring tools : depth micrometers Assignees: L. S. Starrett Co. - Athol, Worcester County, MA Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Oct. 08, 1928 Granted: Aug. 15, 1933 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for L. S. Starrett Co. Wikipedia entry for the L. S. Starrett Company The Starrett Story History of the L. S. Starrett Co.

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