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US Patent: 508,268
Machine for Sharpening Drills
Patentee:
John Sellers Bancroft (exact or similar names) - Philadelphia, PA

USPTO Classifications:
451/138, 451/375

Tool Categories:
metalworking machines : grinders : drill grinders

Assignees:
William Sellers & Co. - Philadelphia, PA

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Jul. 21, 1893
Granted: Nov. 07, 1893

Patent Pictures:
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Report data errors or omissions to steward Joel Havens
"Vintage Machinery" entry for William Sellers & Co.

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