Title:
Mine haulage system and apparatus therefor
Document Type and Number:
United States Patent 2264007

Inventors:
Russell, John D.
Publication Date:
11/25/1941
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Assignee:
JOY MFG CO
Primary Class:
191/12R
Other Classes:
191/12.20A
International Classes:
E21F13/06; E21F13/00




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