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US Patent: 216,966
Machine for Trimming Circular Valves
Patentee:
George L. Miller (exact or similar names) - Rouseville, Venango County, PA

USPTO Classifications:
142/42

Tool Categories:
specialty tools : valve facing tool

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Oct. 04, 1878
Granted: Jul. 01, 1879

Patent Pictures:
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