with iron or steel

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CPC
E21D5/06

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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21DSHAFTS TUNNELS GALLERIES LARGE UNDERGROUND CHAMBERS E21D5/00Lining shafts Linings therefor

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E21D5/06with iron or steel

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Patents Grantslast 30 patents

Information Patent Grant
Hollow rebar for crosshole sonic logging access tubes and longitudi...
- Patent number 9,074,473
- Issue date Jul 7, 2015
- Con-Tech Systems Ltd.
- Josef K. Alter
- G01 - MEASURING TESTING
Information Patent Grant
Underground rock chutes
- Patent number 4,371,289
- Issue date Feb 1, 1983
- Gold Fields Mining and Development Limited
- David F. Odendaal
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method and apparatus for supporting the wall of an upwardly excavat...
- Patent number 4,207,016
- Issue date Jun 10, 1980
- Dowa Mining Co., Ltd.
- Takayuki Jinno
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method of shipping and assembling rectangular structural unit
- Patent number 4,133,472
- Issue date Jan 9, 1979
- Herris M. Maxwell
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES

Patents Applicationslast 30 patents

Information Patent Application
HOLLOW REBAR FOR CROSSHOLE SONIC LOGGING ACCESS TUBES AND LONGITUDI...
- Publication number 20120314540
- Publication date Dec 13, 2012
- Josef K. ALTER
- G01 - MEASURING TESTING