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US Patent: 127,121
Improvement in Tools for Grooving the Rings of Spinning Frames
Patentee:
Charles E. Trowbridge (exact or similar names) - Whitinsville, Worcester County, MA

USPTO Classifications:
407/64

Tool Categories:
metalworking machines : metal lathes : lathe tools

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Granted: May 21, 1872

Patent Pictures:
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