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US Patent: 572,445
Sectional expansion-tap
Patentee: Benjamin W. Prentice (exact or similar names) - Worcester, Worcester County, MA USPTO Classifications: 408/167 Tool Categories: industrial tools : taps and dies metalworking tools : taps and dies Assignees: Albert F. Prentice - Worcester, Worcester County, MA Vernon F. Prentice - Worcester, Worcester County, MA Manufacturer: Prentice Brothers Co. - Worcester, Worcester County, MA Witnesses: Simeon E. King Charles H. Burleigh	Patent Dates: Applied: Mar. 10, 1896 Granted: Dec. 01, 1896 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Prentice Bros.

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