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US Patent: 111,532
Improvement in machines for boring posts
Patentee:
Jesse R. Group (exact or similar names) - Idaville, PA

USPTO Classifications:
74/840

Tool Categories:
metalworking machines : drilling and boring

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Daniel H. Markley
Isaac Group
Patent Dates:
Granted: Feb. 07, 1871

Patent Pictures:
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