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US Patent: 112,379
Improvement in machines for shaping and cutting gear-cutters
Patentee: Francis A. Pratt (exact or similar names) - Hartford, CT USPTO Classifications: 29/27B, 29/27R, 409/190, 82/11.1 Tool Categories: Assignees: Pratt & Whitney Co. - Hartford, CT Manufacturer: Not known to have been produced Witnesses: Charles S. Bement Jeremy W. Bliss	Patent Dates: Granted: Mar. 07, 1871 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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