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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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