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US Patent: 385,347
Metal Hardening Device
Patentee:
John G. Folsom (exact or similar names) - Winchendon, Worcester County, MA

USPTO Classifications:
266/274

Tool Categories:
specialty machines : heat treating machines

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Dec. 23, 0187
Granted: Jul. 03, 1888

Patent Pictures:
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