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US Patent: 157,099
Improvement in hand-drills for drilling metal
Patentee:
Donald D. MacKay (exact or similar names) - Whitestone, NY

USPTO Classifications:
433/141, 74/127

Tool Categories:
woodworking tools : hand drills

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
M. M. Livingston
A. J. De Lacy
Patent Dates:
Granted: Nov. 24, 1874

Patent Pictures:
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