Title:
MINE ROOF SUPPORT SYSTEMS
United States Patent 3453935


Inventors:
Rieschel, Hans
Application Number:
US3453935DA
Publication Date:
07/08/1969
Filing Date:
03/18/1968
Assignee:
BERGWERKSVERBAND GMBH
Primary Class:
Other Classes:
405/299
International Classes:
E21D23/00; E21D23/26; G05B19/44; (IPC1-7): F01B23/00; E21D23/04; F02B73/00
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