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US Patent: 432,779
Protractor
Patentee: John P. B. Wells (exact or similar names) - Athol, MA USPTO Classifications: 33/470 Tool Categories: metalworking tools : machinist tools : measuring tools : protractors layout tools : protractors Assignees: None Manufacturer: Not known to have been produced Witnesses: John N. Donovan Joseph T. Newell	Patent Dates: Applied: Apr. 04, 1890 Granted: Jul. 22, 1890 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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