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Patent number:
Patent Date:
US Patent: 188,978
Adjustable Tap Wrench
Patentee:
Roswell H. St. John (
exact
or
similar
names) - Springfield, OH
USPTO Classifications:
408/240
,
81/155
,
81/77
Tool Categories:
wrenches
:
tap wrenches and die stocks
Assignees:
None
Manufacturer:
Not known to have been produced
Witnesses:
Edward W. Mullikin
A. T. Byers
Patent Dates:
Applied:
Mar. 02, 1877
Granted:
Mar. 27, 1877
Patent Pictures:
USPTO
(New site tip)
Google Patents
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