Plug cutter
United States Patent 2748817
US Patent References:
/0017395.html
- - 0017395

/0476312.html
- - 0476312

Rotary plug-routing bit
- - 1494897

Tubular boring tool
- - 2027139


Inventors:
Stearns, Walter I.
Publication Date:
06/05/1956
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Assignee:
Stearns, Walter I.
Primary Class:
408/204
International Classes:
B23B51/04