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US Patent: 631,159
Machine for Cold Rolling
Patentee: Frank G. Echols (exact or similar names) - Hartford, Hartford County, CT USPTO Classifications: 72/104 Tool Categories: metalworking machines : metal threading machines : thread rolling machines Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Nov. 04, 1898 Granted: Aug. 15, 1899 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Pratt, Whitney & Co.
Description: Frank G. Echols was a manager at the Pratt & Whitney Co.

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