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US Patent: 1,116,532
Screwdriver Attachment
Patentee:
Ralph A. Armstrong (exact or similar names) - Atlanta, GA

USPTO Classifications:
279/42, 279/46.3, 81/453

Tool Categories:
screwdrivers

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Frank W. Holt, Jr.
Chas. A. Dean
Patent Dates:
Applied: Mar. 14, 1912
Granted: Nov. 10, 1914

Patent Pictures:
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