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US Patent: 1,118,250
Spiral tool-driver
Patentee:
Charles Wilder (exact or similar names) - San Diego, CA

USPTO Classifications:
74/127

Tool Categories:
screwdrivers : screwdriver mechanisms : spiral screwdrivers

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Abram B. Bowman
Edith Manwaring
Patent Dates:
Applied: Jul. 24, 1912
Granted: Nov. 24, 1914

Patent Pictures:
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