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US Patent: 972,330
Square
Patentee: Charles H. Caldwell (exact or similar names) - Portland, OR USPTO Classifications: 403/95 Tool Categories: layout tools : squares : carpenter squares Assignees: None Manufacturer: Not known to have been produced Witnesses: W. N. Woodson Frederick S. Stitt	Patent Dates: Applied: Mar. 15, 1910 Granted: Oct. 11, 1910 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin (dm)

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