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US Patent: 375,049
Bevel Protractor
Patentee: Michael Coughlin (exact or similar names) - Philadelphia, PA USPTO Classifications: 33/473 Tool Categories: metalworking tools : machinist tools : measuring tools : protractors layout tools : squares : bevel squares Assignees: None Manufacturer: Not known to have been produced Witnesses: R. M. Hunter Andrew Zane, Jr.	Patent Dates: Applied: Jun. 23, 1887 Granted: Dec. 20, 1887 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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