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US Patent: 315,271
Combines Boring Bar and Centering Mandrel
Patentee:
Philetus W. Gates (exact or similar names) - Chicago, Cook County, IL

USPTO Classifications:
144/99, 82/15

Tool Categories:
metalworking tools : boring bars
metalworking tools : mandrels and arbors

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: May 26, 1884
Granted: Apr. 07, 1885

Patent Pictures:
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