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US Patent: 81,450
Improvement in watchmaker drills
Patentee:
Alois Wirsching - Brooklyn, NY

USPTO Classifications:
74/89

Tool Categories:
trade specific : watchmaker
woodworking tools : hand drills

Assignees:
Albert Wild - Brooklyn, NY
Alois Wirsching - Brooklyn, NY

Manufacturer:
Not known to have been produced

Witnesses:
Alexander F. Roberts
Frank Blockley

Patent Dates:
Granted: Aug. 25, 1868

Patent Pictures:
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Description:
This patent was improved in patent 113,344.

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