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US Patent: 290,612
Knurling-tool
Patentee: William W. Tucker (exact or similar names) - Hartford, CT USPTO Classifications: 72/237, 72/479, 72/703 Tool Categories: metalworking machines : metal lathes : lathe tools Assignees: Pratt & Whitney Co. - Hartford, CT Manufacturer: Pratt & Whitney Co. - Hartford, CT Witnesses: Charles L. Burdett William H. Marsh	Patent Dates: Applied: Apr. 18, 1881 Granted: Dec. 18, 1883 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Pratt & Whitney Co.

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