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US Patent: 2,154,947
Hardening Metal Surfaces
Patentees: Arthur H. Lloyd (exact or similar names) - Coventry, Warwickshire County, England Herbert H. Beeny (exact or similar names) - Coventry, Warwickshire County, England USPTO Classifications: 148/543, 148/639 Tool Categories: specialty machines : flame hardening machines Assignees: Monarch Machine Tool Co. - Sidney, Shelby County, OH Manufacturer: Cincinnati Lathe & Tool Co. - Cincinnati, Hamilton County, OH Cincinnati Milling Machine Co. - Cincinnati, Hamilton County, OH Thompson Grinder Co. - Springfield, Clark County, OH Witnesses: none listed	Patent Dates: Applied: Jun. 17, 1937 Granted: Apr. 18, 1939 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Monarch Machine Tool Co. "Vintage Machinery" entry for Cincinnati Milling Machine Co. "Vintage Machinery" entry for Thompson Grinder Co.
Description: Application in Great Britain, 20 Jun 1936. This patent number was seen on Cincinnati Milling Machine Co. and Thompson Grinder Co. patent plates.

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