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US Patent: 9,457
Screwdriver
Patentee:
Jacob W. Switzer - Basil, OH

USPTO Classifications:
142/52, 81/453

Tool Categories:
screwdrivers
woodworking tools : braces

Assignees:
None

Manufacturer:
Unknown

Witnesses:
H. B. Apt
A. T. Mason

Patent Dates:
Granted: Dec. 07, 1852

Patent Pictures: [ 1 | 2 ]
USPTO pdf tiff
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Description:
Self holding screwdriver designed to be attached to a bitstock brace.

Known example is marked: PATENTED/DEC.7.1852 and JSW

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