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US Patent: 6,909
Improvement in boring-machines
Patentee:
James H. Aldrich (exact or similar names) - Portsmouth, NH

USPTO Classifications:
408/241R

Tool Categories:
metalworking machines : drilling and boring
trade specific : shipwright

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Alfred M. Hoyt
Samuel Raker
Patent Dates:
Granted: Nov. 27, 1849

Patent Pictures:
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