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US Patent: 453,162
Apparatus for Hardening and Tempering Steel and Iron
Patentee:
Elias E. Ries (exact or similar names) - Baltimore, MD

USPTO Classifications:
219/119, 219/155, 266/104, 266/111, 266/112

Tool Categories:
specialty machines : heat treating machines

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Oct. 31, 1888
Granted: May 26, 1891

Patent Pictures:
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