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US Patent: 914,012
Ratchet Drill
Patentee:
Paul Armstrong (exact or similar names) - Chicago, Cook County, IL

USPTO Classifications:
408/121

Tool Categories:
woodworking tools : hand drills : drill accessories

Assignees:
Armstrong Bros. Tool Co. - Chicago, Cook County, IL

Manufacturer:
Armstrong Bros. Tool Co. - Chicago, Cook County, IL

Witnesses:
L. L. Miller
George L. Chindahl
C. Paul Parker

Patent Dates:
Applied: Nov. 15, 1906
Granted: Mar. 02, 1909

Patent Pictures: [ 1 | 2 ]
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Armstrong Brothers Tool Co. history
"Vintage Machinery" entry for Armstrong Brothers Tool Co.
Description:
Luther L. Miller - patent attorney

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