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US Patent: 138,570
Drilling Machines
Patentee:
Henry Martin (exact or similar names) - Duncan, Allegheny County, PA

USPTO Classifications:
408/137

Tool Categories:
metalworking machines : drilling and boring : portable metal drilling machines

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Feb. 21, 1873
Granted: May 06, 1873

Patent Pictures:
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