Method of and means for supporting roof strata during the mining of minerals

Title:

Method of and means for supporting roof strata during the mining of minerals

United States Patent 1630589

Inventors:

Taber, William P.

Publication Date:

05/31/1927

Export Citation:

Assignee:

Taber, William P.

Primary Class:

299/11

Other Classes:

248/351, 299/33, 405/288

International Classes:

E21D17/00; E21D17/00

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