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Patent number:
Patent Date:
US Patent: 281,568
Extension-Shank for Bits
Patentee:
Caspar Schoch (
exact
or
similar
names) - Truckee, CA
USPTO Classifications:
279/56
,
279/91
Tool Categories:
woodworking tools
:
hand drills
:
drill bit extensions
Assignees:
None
Manufacturer:
Not known to have been produced
Witnesses:
James L. Norris
J. A. Rutherford
Patent Dates:
Applied:
Jun. 15, 1883
Granted:
Jul. 17, 1883
Patent Pictures:
USPTO
(New site tip)
Google Patents
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