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US Patent: 644,430
Center Gage
Patentee: William Johnson (exact or similar names) - Boston, MA USPTO Classifications: 33/673 Tool Categories: layout tools : marking gauges : center marking gauges Assignees: None Manufacturer: Not known to have been produced Witnesses: George A. Walsh K. T. Butler George O. G. Coale E. A. Guild	Patent Dates: Applied: Dec. 06, 1898 Granted: Feb. 27, 1900 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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