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Patent number:
Patent Date:
US Patent: 454,197
Screw Thread Cutting Machine
Patentees:
Elzie Ament (
exact
or
similar
names) - Rogers Park, Cook County, IL
Herbert L. Ament (
exact
or
similar
names) - Rogers Park, Cook County, IL
USPTO Classifications:
408/156
,
408/172
Tool Categories:
metalworking machines
:
metal threading machines
Assignees:
None
Manufacturer:
Not known to have been produced
Witnesses:
Unknown
Patent Dates:
Applied:
Feb. 25, 1890
Granted:
Jun. 16, 1891
Patent Pictures:
USPTO
(New site tip)
Google Patents
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