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US Patent: D3,603
Design for a grinding-machine
Patentee: Thomas H. Worrall (exact or similar names) - East Blackstone, MA USPTO Classifications: D15/124 Tool Categories: metalworking machines : grinders : sharpening machines : bench or pedestal grinders Assignees: American Twist Drill Co. - East Blackstone, MA Manufacturer: American Twist Drill Co. - Woonsocket, RI Witnesses: William H. Jenckes George A. Wilbur	Patent Dates: Granted: Aug. 03, 1869 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for American Twist Drill Co.

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