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US Patent: 387,481
Protractor
Patentee: Gustaf Almorth (exact or similar names) - Waltham, Middlesex County, MA USPTO Classifications: 235/103 Tool Categories: metalworking tools : machinist tools : measuring tools : protractors layout tools : protractors Assignees: Gustaf Almorth - Waltham, Middlesex County, MA John Stark - Waltham, Middlesex County, MA Manufacturer: Not known to have been produced Witnesses: William H. Johnson R. M. Stark	Patent Dates: Applied: May 04, 1888 Granted: Aug. 07, 1888 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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