Assignee
CHINA RAILWAY NO 3 ENG GROUP
CN·2 granted patents·0 citations·filing 2021–2024
Top patents by PatentIndex Score
2 records- 0160US12350786B2Apparatus for automatically polishing butt weld of ultralong large-diameter pipelineCHINA RAILWAY NO 3 ENG GROUP·Filed 2024·Granted Jul 8, 2025·0 cites·2 claims
- 0230US11655600B2Method for installing steel tube archesCHINA RAILWAY NO 3 ENG GROUP·Filed 2021·Granted May 23, 2023·0 cites·10 claims
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