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US Patent: 167,897
Improvement in ratchet-braces for metal drills
Patentee:
Hubert C. Hart - Unionville, CT

USPTO Classifications:
81/32

Tool Categories:
woodworking tools : braces : ratchet braces

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Granted: Sep. 21, 1875

Patent Pictures:
USPTO pdf tiff
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