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US Patent: 2,412,333
Flame Hardening Apparatus
Patentee: Albert L. Hartley (exact or similar names) - Cincinnati, OH USPTO Classifications: 266/121, 266/123, 266/134 Tool Categories: metalworking machines Assignees: R. K. Le Blond Machine Tool Co. - Cincinnati, OH Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Nov. 27, 1942 Granted: Dec. 10, 1946 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for R. K. Leblond Machine Tool Co.

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