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US Patent: 2,220,002
Heat Treating
Patentees:
Martin Rollman - Cincinnati, Hamilton County, OH
William A. Maddox - Cincinnati, Hamilton County, OH
Henry M. S. Binns - Cincinnati, Hamilton County, OH

USPTO Classifications:
266/121, 266/127, 266/87

Tool Categories:
specialty machines : heat treating machines

Assignees:
Cincinnati Milling Machine Co. - Cincinnati, Hamilton County, OH

Manufacturer:
Cincinnati Lathe & Tool Co. - Cincinnati, Hamilton County, OH

Witnesses:
Unknown

Patent Dates:
Applied: May 17, 1939
Granted: Oct. 29, 1940

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for Cincinnati Milling Machine Co.

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