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US Patent: 57,107
Improved Screw Driver
Patentee:
Cyrus Eversol - Commerce, MO

USPTO Classifications:
279/83, 81/32, 81/63

Tool Categories:
screwdrivers : screwdriver mechanisms : ratcheting screwdrivers
screwdrivers : screwdriver blades

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
George H. Watson
Carroll Moye

Patent Dates:
Granted: Aug. 14, 1866

Patent Pictures:
USPTO pdf tiff
Google Patents
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Description:
Cross tip style blade (Phillips style, well before Mr. Philips patented his design) as well as an external, double pawl, ratching mechanism.

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