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US Patent: 191,815
Bit-stock with gear-train multiplier
Patentee:
Daniel Powers - Shelburne Falls, MA

USPTO Classifications:
74/423, 81/36

Tool Categories:
woodworking tools : braces : geared braces

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Granted: Jun. 12, 1877

Patent Pictures:
USPTO pdf tiff
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