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US Patent: 133,573
Improvement in Hollow Augers
Patentee:
Martin L. Edwards - Salem, OH

USPTO Classifications:
30/495

Tool Categories:
woodworking tools : hand drills : drill bits : hollow bits

Assignees:
None

Manufacturer:
M. L. Edwards Co. - Salem, OH

Witnesses:
B. S. Ambler
Peter Ambler

Patent Dates:
Granted: Dec. 03, 1872

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for M. L. Edwards Co.

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