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Patent number:
Patent Date:
US Patent: 1,722,116
Screw Driver
Screw holding screwdriver
Patentee:
Stephen E. Spofford (
exact
or
similar
names) - Lynn, MA
USPTO Classifications:
81/499
Tool Categories:
specialty tools
:
screw starters
screwdrivers
:
screwdriver blades
Assignees:
None
Manufacturer:
Unknown
Witnesses:
Unknown
Patent Dates:
Applied:
Jun. 10, 1927
Granted:
Jul. 23, 1929
Patent Pictures: [
1
|
2
|
3
]
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