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US Patent: 77,130
Improvement in try-squares
Patentee: Edwin J. Toof (exact or similar names) - Fort Madison, IA USPTO Classifications: 33/32.2 Tool Categories: layout tools : squares : try squares Assignees: None Manufacturer: Not known to have been produced Witnesses: E. C. Beals W. E. Marrs	Patent Dates: Granted: Apr. 21, 1868 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin

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