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US Patent: 73,504
Improvement in ploughs
Patentee:
William S. Colwell (exact or similar names) - Pittsburgh, PA

USPTO Classifications:
172/760

Tool Categories:

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
A. C. Johnston
James J. Johnston
Patent Dates:
Granted: Jan. 21, 1868

Patent Pictures:
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Description:
Of interest because the inventor patented and manufactured sawmills.

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