Assignee
China railway engineering equipment group co ltd
CN·4 granted patents·3 citations·filing 2014–2017
Top patents by PatentIndex Score
4 records- 0159US10202807B2Vertical shaft drilling rig using novel drilling methodChina railway engineering equipment group co ltd·Filed 2014·Granted Feb 12, 2019·3 cites·2 claims
- 0241US10077657B2Compound-type tunneling shieldChina railway engineering equipment group co ltd·Filed 2014·Granted Sep 18, 2018·0 cites·5 claims
- 0336US9995086B2Center-pillared full-face shaft drilling machineChina railway engineering equipment group co ltd·Filed 2014·Granted Jun 12, 2018·0 cites·9 claims
- 0435US10648333B2Mixing and guniting device of new type for TBMChina railway engineering equipment group co ltd·Filed 2017·Granted May 12, 2020·0 cites·7 claims
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