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US Patent: 1,309,654
Centering Tool
Patentee: John Russell Parks (exact or similar names) - Franklinville, NC USPTO Classifications: 33/672 Tool Categories: layout tools : marking gauges : center marking gauges Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Apr. 03, 1918 Granted: Jul. 15, 1919 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Ralph Brendler
Description: This gage automatically adjusts a collar to the center of a round workpiece, allowing the center to be quickly and easily marked.

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