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US Patent: 1,460,201
Spiral tool
Patentee:
George O. Leopold (exact or similar names) - Philadelphia, PA

USPTO Classifications:
74/127

Tool Categories:
screwdrivers : screwdriver mechanisms : spiral screwdrivers

Assignees:
North Brothers Manufacturing Co. - Philadelphia, PA

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Mar. 28, 1922
Granted: Jun. 26, 1923

Patent Pictures:
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