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US Patent: 643,927
Drill-grinder
Patentee:
Oakley S. Walker - Worcester, MA

USPTO Classifications:
451/276, 451/375

Tool Categories:
metalworking machines : grinders : sharpening machines : drill sharpening machines
metalworking machines : grinders : drill grinders

Assignees:
None

Manufacturer:
O. S. Walker & Co. - Worcester, MA

Witnesses:
Pauline Winkler
Rufus B. Fowler

Patent Dates:
Applied: Nov. 21, 1899
Granted: Feb. 20, 1900

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for O. S. Walker & Co.

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