Bases for lower arch members

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Industry

CPC
E21D11/30

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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21DSHAFTS TUNNELS GALLERIES LARGE UNDERGROUND CHAMBERS E21D11/00Lining tunnels, galleries or other underground cavities

Current Industry

E21D11/30Bases for lower arch members

Industries

Patents Grantslast 30 patents

Information Patent Grant
Rib for supporting and reinforcing an excavation
- Patent number 9,085,977
- Issue date Jul 21, 2015
- ELAS GEOTECNICA S.R.L.
- Cristiano Bonomi
- E21 - EARTH DRILLING MINING
Information Patent Grant
Composite arch structure
- Patent number 4,010,617
- Issue date Mar 8, 1977
- Armco Steel Corporation
- Christopher L. Fisher
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
RIB FOR SUPPORTING AND CONSOLIDATING AN EXCAVATION AND METHOD FOR I...
- Publication number 20170096896
- Publication date Apr 6, 2017
- OFFICINE MACCAFERRI ITALIA S.R.L.
- Cristiano BONOMI
- E21 - EARTH DRILLING MINING
Information Patent Application
RIB FOR SUPPORTING AND REINFORCING AN EXCAVATION
- Publication number 20120301223
- Publication date Nov 29, 2012
- Cristiano Bonomi
- E21 - EARTH DRILLING MINING