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US Patent: 54,069
Improvement in drill-stocks
Patentee:
D. Frank Hartford - Boston, MA

USPTO Classifications:
74/127

Tool Categories:
woodworking tools : hand drills : spiral drills

Assignees:
Edmund Tarbell - Boston, MA

Manufacturer:
Not known to have been produced

Witnesses:
George R. Clarke
Thomas William Clarke

Patent Dates:
Granted: Apr. 17, 1866

Patent Pictures:
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