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US Patent: 2,378,890
Surface Hardening Metal Areas of Limited Size
Patentees:
Philber A. Abe (exact or similar names) - Sidney, Shelby County, OH
Herbert H. Brown (exact or similar names) - Dayton, Montgomery County, OH
Melvin A. Crosby (exact or similar names) - Dayton, Montgomery County, OH

USPTO Classifications:
219/677, 266/125, 266/127, 266/129

Tool Categories:
manufacturing : manufacturing processes : metal hardening

Assignees:
Monarch Machine Tool Co. - Sidney, Shelby County, OH

Manufacturer:
Monarch Machine Tool Co. - Sidney, Shelby County, OH

Witnesses:
Unknown

Patent Dates:
Applied: Feb. 05, 1941
Granted: Jun. 26, 1945

Patent Pictures:
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Report data errors or omissions to steward Joel Havens
"Vintage Machinery" entry for Monarch Machine Tool Co.

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