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US Patent: 418,167
Screwdriver
Patentee:
Thomas E. Copelin - Chicago, IL

USPTO Classifications:
16/430, 279/100, 81/33, 81/436

Tool Categories:
screwdrivers

Assignees:
Thomas E. Copelin - Chicago, IL
Francis Kernan, Jr. - Utica, NY
Joseph F. Kernan - Utica, NY

Manufacturer:
Not known to have been produced

Witnesses:
Edw. S. Evarts
H. M. Munday

Patent Dates:
Applied: Feb. 25, 1889
Granted: Dec. 31, 1889

Patent Pictures:
USPTO pdf tiff
Google Patents
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Description:
Screwdriver design that allows the lower portion to be turned by your fingers while the portion that contacts your palm remains stationary. Specific application mentioned is for light screws and putting screws in sheet metal.

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