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US Patent: 1,725,515
Method of sharpening hollow or mortiser chisels
Patentees:
Adolph H. Hawkinson (exact or similar names) - Rockford, IL
Erick W. Peterson (exact or similar names) - Rockford, IL

USPTO Classifications:
408/18, 408/1R, 408/229, 408/30, 76/119

Tool Categories:
metalworking machines : grinders : sharpening machines

Assignees:
Greenlee Brothers & Co. - Rockford, IL

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Mar. 19, 1925
Granted: Aug. 20, 1929

Patent Pictures:
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Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for Greenlee Brothers & Co.

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