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US Patent: 433,084
Protractor
Patentee: Duane J. Kelsey (exact or similar names) - New Haven, CT USPTO Classifications: 33/425 Tool Categories: metalworking tools : machinist tools : measuring tools : protractors layout tools : protractors Assignees: None Manufacturer: Not known to have been produced Witnesses: Louis D. Beeher Frederick A. Yeomans	Patent Dates: Applied: Sep. 10, 1889 Granted: Jul. 29, 1890 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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