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US Patent: 11,587
Tool for boring recesses for casters, &c.
Patentee: Benjamin F. Graves (exact or similar names) - Boston, MA USPTO Classifications: 408/224 Tool Categories: metalworking machines : drilling and boring : drill bits woodworking tools : hand drills : drill bits Assignees: William C. Knowlton - Boston, MA Manufacturer: Not known to have been produced Witnesses: Francis Gould R. H. Eddy	Patent Dates: Granted: Aug. 22, 1854 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin
Description: City directories of the 1870s list our assignee, William C. Knowlton of Boston, as a "turner and bracket maker".

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