Assignee
CHINA RAILWAY 14TH BUREAU GROUP CO LTD
CN·2 granted patents·0 citations·filing 2020–2020
Technology mixE21D2
Top patents by PatentIndex Score
2 records- 0142US11905834B2Shield sealing device and shield sealing methodCHINA RAILWAY 14TH BUREAU GROUP CO LTD·Filed 2020·Granted Feb 20, 2024·0 cites·11 claims
- 0228US11927098B2Method and apparatus for controlling stratum deformation in shield construction process, and non-volatile storage mediumCHINA RAILWAY 14TH BUREAU GROUP CO LTD·Filed 2020·Granted Mar 12, 2024·0 cites·13 claims
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