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US Patent: 460,497
Tool Grinding Machine
Patentee: John Sellers Bancroft (exact or similar names) - Philadelphia, PA USPTO Classifications: 451/239, 451/369 Tool Categories: metalworking machines : grinders : tool grinders Assignees: William Sellers & Co., Inc. - Philadelphia, PA Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Nov. 15, 1889 Granted: Sep. 29, 1891 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for William Sellers & Co.
Description: Original application filed 12 May 1887. Divided and this application filed 15 Nov 1889.

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