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US Patent: 1,503,206
Combination valve grinder and drill
Patentee:
Arthur W. Ojerholm - Worcester, MA

USPTO Classifications:
29/26B, 408/124, 408/20, 408/27, 451/117, 74/318, 74/81

Tool Categories:
trade specific : automobile mechanic
woodworking machines : handheld power tools : handheld drills

Assignees:
Worcester Electric Tool Co. - Worcester, MA

Manufacturer:
Worcester Electric Tool Co. - Worcester, MA

Witnesses:
Unknown

Patent Dates:
Applied: Nov. 29, 1920
Granted: Jul. 29, 1924

Patent Pictures:
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