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Patent number:
Patent Date:
US Patent: 1,783,070
Screw Driver
Screw holding screwdriver
Patentee:
Fredrick R. Bergmann (
exact
or
similar
names) - Pueblo, CO
USPTO Classifications:
81/439
,
81/456
Tool Categories:
screwdrivers
:
screwdriver blades
Assignees:
None
Manufacturer:
Not known to have been produced
Witnesses:
Unknown
Patent Dates:
Applied:
Mar. 22, 1930
Granted:
Nov. 25, 1930
Patent Pictures:
USPTO
(New site tip)
Google Patents
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