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Patent number:
Patent Date:
US Patent: 410,484
Machine for Cutting Screw Blanks and Screws
Patentee:
John P. Berkholz (
exact
or
similar
names) - Philadelphia, PA
USPTO Classifications:
470/176
,
470/69
Tool Categories:
metalworking machines
:
cutting-off and centering machines
metalworking machines
:
metal threading machines
Assignees:
None
Manufacturer:
Not known to have been produced
Witnesses:
Unknown
Patent Dates:
Applied:
Mar. 26, 1889
Granted:
Sep. 03, 1889
Patent Pictures:
USPTO
(New site tip)
Google Patents
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