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US Patent: 88,585
Improved Process of hardening Steel
Patentee:
George H. Porter (exact or similar names) - Bristol, CT

USPTO Classifications:
148/645

Tool Categories:

Assignees:
Porter Saw Co. - Bristol, CT

Manufacturer:
Not known to have been produced

Witnesses:
S. P. Newell
Edw'd W. Lowrey
Patent Dates:
Granted: Apr. 06, 1869

Patent Pictures:
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