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US Patent: 738,422
Machinist's Try Square
Patentee: Anthony Duffy (exact or similar names) - San Francisco, CA USPTO Classifications: 33/428, 33/812 Tool Categories: layout tools : squares : try squares Assignees: None Manufacturer: Not known to have been produced Witnesses: M. Regner George P. Brand J. H. Browning A. W. Hansen	Patent Dates: Applied: Jul. 14, 1902 Granted: Sep. 08, 1903 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens
Description: G. G. Osborn - patent attorney

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