CHINA RAILWAY BEIJING ENGINEERING GROUP CO., LTD

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Patents Grantslast 30 patents

Information Patent Grant
Split air cabin ventilation system for construction of tunnel incli...
- Patent number 11,674,392
- Issue date Jun 13, 2023
- CHINA RAILWAY BEIJING ENGINEERING GROUP CO., LTD
- Shuangqin Chen
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
CONSTRUCTION PROCESS FOR QUICKLY AND INTEGRALLY REPLACING DAMAGED P...
- Publication number 20220228323
- Publication date Jul 21, 2022
- CHINA RAILWAY BEIJING ENGINEERING GROUP CO., LTD
- Jianguo Wang
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information Patent Application
SPLIT AIR CABIN VENTILATION SYSTEM FOR CONSTRUCTION OF TUNNEL INCLI...
- Publication number 20210207481
- Publication date Jul 8, 2021
- CHINA RAILWAY BEIJING ENGINEERING GROUP CO.,LTD
- Shuangqin CHEN
- E21 - EARTH DRILLING MINING

Trademarklast 30 trademarks