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US Patent: 405,432
Center Square, Bevel & Protractor
Patentee: Wallace E, Pratt - Boston, MA USPTO Classifications: 33/419 Tool Categories: metalworking tools : machinist tools : measuring tools : protractors layout tools : protractors layout tools : bevels layout tools : marking gauges : center marking gauges Assignees: None Manufacturer: Not known to have been produced Witnesses: H. E. Lodge Francis C. Stanwood	Patent Dates: Applied: Apr. 15, 1889 Granted: Jun. 18, 1889 Patent Pictures: USPTO pdf tiff Google Patents Report data errors or omissions

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