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US Patent: 1,625,766
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Patentee: Robert J. O. Simpson (exact or similar names) - Athol, MA USPTO Classifications: 33/544.5 Tool Categories: layout tools : measurement gauges Assignees: L. S. Starrett Co. - Athol, MA Manufacturer: Not known to have been produced Witnesses: none listed	Patent Dates: Applied: Aug. 21, 1922 Granted: Apr. 19, 1927 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens L. S. Starrett Co.-125th Anniversary History of the L. S. Starrett Co. Biography of L. S. Starrett "Vintage Machinery" entry for L. S. Starrett Co.
Description: Ellis Spear Jr. - patent attorney

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