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US Patent: 285,388
Stamp-mill
Patentee:
John C. Butterfield (exact or similar names) - Chicago, IL

USPTO Classifications:
74/21

Tool Categories:
specialty machines : ore processing apparatus

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
J. C. Turner
R. D. O. Smith

Patent Dates:
Applied: May 01, 1883
Granted: Sep. 25, 1883

Patent Pictures:
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Description:
Improvements to patent 230,611.

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