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US Patent: 87,309
Bit-stock
Patentees:
John W. Thompson (exact or similar names) - Greenfield, MA
Francis M. Thompson (exact or similar names) - Greenfield, MA

USPTO Classifications:
81/35

Tool Categories:
woodworking tools : braces : brace chucks

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Granted: Feb. 23, 1869

Patent Pictures:
USPTO (New site tip)
Google Patents
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