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US Patent: 98,933
Improvement in screw-drivers
Patentee:
David Drummond - McGregor, IA

USPTO Classifications:
81/29

Tool Categories:
screwdrivers

Assignees:
None

Manufacturer:
David Drummond - McGregor, IA

Witnesses:
H. D. Evans
H. H. Barnes

Patent Dates:
Granted: Jan. 18, 1870

Patent Pictures: [ 1 | 2 ]
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Description:
An eBay sale of a "speed drill screwdriver" had this description: "It is 10 1/2 inches long and has a copper plate on the end. The plate is engraved with a wheat pattern, Drummonds Patent Jan 18th 70."

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