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US Patent: 1,259,926
Mechanical movement
Patentee:
Ira E. Stump (exact or similar names) - Cleveland, OH

USPTO Classifications:
74/127

Tool Categories:
screwdrivers : screwdriver mechanisms : spiral screwdrivers

Assignees:
Obed C. Billman - Cleveland, OH

Manufacturer:
Not known to have been produced

Witnesses:
none listed

Patent Dates:
Applied: Nov. 20, 1916
Granted: Mar. 19, 1918

Patent Pictures:
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