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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 Report data errors or omissions to steward Kirk Eppler

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