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US Patent: 686,891
Center Square
Patentee: William A. Dunbar (exact or similar names) - Lynn, MA USPTO Classifications: 33/428 Tool Categories: layout tools : marking gauges : center marking gauges Assignees: None Manufacturer: Not known to have been produced Witnesses: Edward S. Day Fred O. Fish Horace Van Everen Alfred H. Hildreth	Patent Dates: Applied: Jun. 08, 1901 Granted: Nov. 19, 1901 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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