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Patent number:
Patent Date:
US Patent: 143,242
Gear Cutting Attachments to Lathes
Patentee:
William P. Hopkins (
exact
or
similar
names) - Lawrence, MA
USPTO Classifications:
74/813R
Tool Categories:
metalworking machines
:
metal lathes
:
metal lathe accessories and attachments
Assignees:
None
Manufacturer:
Not known to have been produced
Witnesses:
Baldwin Coolidge
George G. Adams
John J. Colby
Patent Dates:
Applied:
Apr. 24, 1873
Granted:
Sep. 30, 1873
Patent Pictures:
USPTO
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