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Industry
CPC
E21D11/28
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Parent Industries
E
FIXED CONSTRUCTIONS
E21
Mining
E21D
SHAFTS TUNNELS GALLERIES LARGE UNDERGROUND CHAMBERS
E21D11/00
Lining tunnels, galleries or other underground cavities
Current Industry
E21D11/28
Longitudinal struts
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Impact
Patents Grants
last 30 patents
Information
Patent Grant
Impact resistant lagging, method for designing impact resistant lag...
Patent number
9,249,663
Issue date
Feb 2, 2016
FCI Holdings Delaware, Inc.
Kevin Jinrong Ma
E21 - EARTH DRILLING MINING
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
3830912
Patent number
3,830,912
Issue date
Aug 20, 1974
A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information
Patent Grant
1735590
Patent number
1,735,590
Issue date
Nov 12, 1929
E04 - BUILDING
Information
Patent Grant
1735591
Patent number
1,735,591
Issue date
Nov 12, 1929
E04 - BUILDING
Patents Applications
last 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
Information
Patent Application
Impact Resistant Lagging, Method For Designing Impact Resistant Lag...
Publication number
20100266349
Publication date
Oct 21, 2010
Jennmar Corporation
Kevin Jinrong Ma
E21 - EARTH DRILLING MINING