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US Patent: 339,277
Screw driver
Patentee:
Joseph R. Doolittle - Southington, CT

USPTO Classifications:
74/127

Tool Categories:
screwdrivers : screwdriver mechanisms : spiral screwdrivers

Assignees:
None

Manufacturer:
Ellrich Hardware Co. - Plantsville, CT

Witnesses:
George Terry
J. Edward Ludington

Patent Dates:
Applied: Dec. 18, 1885
Granted: Apr. 06, 1886

Patent Pictures:
USPTO pdf tiff
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Description:
Marked, "PATD APR 6-86". An article in an 1890 issue of Mechanical News tell us the manufacturer: Ellrich Hardware of Plantsville, Ct.

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