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Patent number:
Patent Date:
US Patent: 279,917
Screw-Driver
Patentee:
Frederick J. Colvin (
exact
or
similar
names) - Hamden, CT
USPTO Classifications:
279/43.3
,
279/97
,
81/438
Tool Categories:
screwdrivers
:
screwdriver blades
Assignees:
None
Manufacturer:
Not known to have been produced
Witnesses:
Henry A. Colvin
Ellsworth B. Cooper
Patent Dates:
Applied:
Apr. 05, 1883
Granted:
Jun. 26, 1883
Patent Pictures:
USPTO
(New site tip)
Google Patents
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