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US Patent: 28,639
Apparatus for dressing grindstones
Patentee: John F. Schuyler (exact or similar names) - Philadelphia, PA USPTO Classifications: 125/37 Tool Categories: industrial tools : grinding wheels : grinder dressers metalworking machines : grinders : grinder dressers Assignees: William E. Lockwood - Philadelphia, PA Manufacturer: George C. Howard - Philadelphia, PA Witnesses: L. M. Blanton Harry Lippincott	Patent Dates: Granted: Jun. 05, 1860 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for George C. Howard
Description: An 1861 ad from George C. Howard lists their products manufactured, including "Schuyler's Hacker for Trueing and Sharpening Grindstones".

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