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US Patent: 464,074
Self-Marking Try-Square
Patentee: William Johnson (exact or similar names) - Hull, MA USPTO Classifications: 33/32.1 Tool Categories: layout tools : squares : try squares layout tools : marking gauges Assignees: None Manufacturer: Not known to have been produced Witnesses: Ellen B. Tomlinson John H. Taylor	Patent Dates: Applied: Apr. 21, 1891 Granted: Dec. 01, 1891 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Steve Gosselin
Description: Also see patent 496227 for improvements.

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