Title:
Cutting method and apparatus
United States Patent 2758543


Inventors:
Grandin, Clarence W.
Application Number:
US15492550A
Publication Date:
08/14/1956
Filing Date:
04/10/1950
Assignee:
Grandin, Clarence W.
Primary Class:
Other Classes:
83/53, 89/1.14, 102/307, 102/319, 123/24A
International Classes:
E21B29/02; E21B29/06; F42B3/08
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