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US Patent: 477,959
Center & Key Seating Rule
Patentee: John B. Price (exact or similar names) - Wollaston, Norfolk County, MA USPTO Classifications: 33/428 Tool Categories: layout tools : marking gauges : center marking gauges Assignees: None Manufacturer: Not known to have been produced Witnesses: Charles F. Thayer Henry J. Thayer	Patent Dates: Applied: Mar. 30, 1892 Granted: Jun. 28, 1892 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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