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US Patent: 607,306
Twist-drill-grinding machine
Patentee:
Oakley S. Walker - Worcester, MA

USPTO Classifications:
451/375

Tool Categories:
metalworking machines : grinders : drill grinders

Assignees:
None

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

Witnesses:
Edna I. Tyler
C. W. Wood

Patent Dates:
Applied: Sep. 13, 1897
Granted: Jul. 12, 1898

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

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