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Patent number:
Patent Date:
US Patent: 56,059
Improvement in Drill-Chucks
Patentee:
Frank G. Johnson (
exact
or
similar
names) - Brooklyn, NY
USPTO Classifications:
279/43.3
,
279/43.6
Tool Categories:
woodworking tools
:
hand drills
:
drill chucks
Assignees:
None
Manufacturer:
Not known to have been produced
Witnesses:
Horace May
A. M. Mills
Patent Dates:
Granted:
Jul. 03, 1866
Patent Pictures:
USPTO
(New site tip)
Google Patents
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