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US Patent: 48,612
Self Centering or Holder
Patentee:
Thomas H. Worrall (exact or similar names) - Lawrence, Essex County, MA

USPTO Classifications:
279/64

Tool Categories:
metalworking machines : drilling and boring : drill presses : drill press chucks

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Granted: Jul. 04, 1865

Patent Pictures:
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