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US Patent: 182,284
Improvement in grinding-machines Planer-knife grinder
Patentee: John L. Otis (exact or similar names) - Leeds, MA USPTO Classifications: 451/273, 451/293 Tool Categories: metalworking machines : grinders : tool grinders Assignees: None Manufacturer: Northampton Emery Wheel Co. - Leeds, MA Witnesses: C. E. Stevens L. B. Field	Patent Dates: Applied: Jul. 10, 1876 Granted: Sep. 19, 1876 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Northampton Emery Wheel Co.
Description: The inventor was co-founder, in 1867, of the Northampton Emery Wheel Co.

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