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inflatable sealing means
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CPC
E21D11/386
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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
E21D11/386
inflatable sealing means
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Patents Grants
last 30 patents
Information
Patent Grant
Tunnel adaptive lining structure in complex environment and constru...
Patent number
11,499,427
Issue date
Nov 15, 2022
China Institute of Water Resources and Hydropower Research
Xiaogang Wang
E21 - EARTH DRILLING MINING
Information
Patent Grant
Advancement of pipe elements in the ground
Patent number
8,231,306
Issue date
Jul 31, 2012
Stefan Trümpi
E21 - EARTH DRILLING MINING
Information
Patent Grant
Method of connection
Patent number
5,489,164
Issue date
Feb 6, 1996
Colebrand Limited
Klaus N. Tusch
E04 - BUILDING
Information
Patent Grant
2333826
Patent number
2,333,826
Issue date
Nov 9, 1943
E04 - BUILDING
Patents Applications
last 30 patents
Information
Patent Application
TUNNEL ADAPTIVE LINING STRUCTURE IN COMPLEX ENVIRONMENT AND CONSTRU...
Publication number
20220120183
Publication date
Apr 21, 2022
CHINA INSTITUTE OF WATER RESOURCES AND HYDROPOWER RESEARCH
Xiaogang Wang
E21 - EARTH DRILLING MINING
Information
Patent Application
Advancement Of Pipe Elements In The Ground
Publication number
20070280786
Publication date
Dec 6, 2007
Stefan Trumpi
E21 - EARTH DRILLING MINING