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Patent number:
Patent Date:
US Patent: 77,530
Cutting Screws
Patentee:
J. H. Richardson (
exact
or
similar
names) - Chicago, Cook County, IL
USPTO Classifications:
408/174
,
470/75
Tool Categories:
metalworking machines
:
metal lathes
:
screwcutting lathes
Assignees:
None
Manufacturer:
Not known to have been produced
Witnesses:
Unknown
Patent Dates:
Granted:
May 05, 1868
Patent Pictures:
USPTO
(New site tip)
Google Patents
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