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Patent number:
Patent Date:
US Patent: 1,781,470
Screw Driver
Screw holding screwdriver
Patentee:
Emil Mueller (
exact
or
similar
names) - Cranston, RI
USPTO Classifications:
81/449
Tool Categories:
specialty tools
:
screw starters
screwdrivers
:
screwdriver blades
Assignees:
None
Manufacturer:
Not known to have been produced
Witnesses:
Unknown
Patent Dates:
Applied:
Apr. 11, 1930
Granted:
Nov. 11, 1930
Patent Pictures:
USPTO
(New site tip)
Google Patents
Report data errors or omissions to steward Steve Gosselin
Description:
Also Pearson's patent
2150184
Very similar.
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