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42 inventors (with patents filed for the assignee):

Kairong Hong (2 out of 2 patents)

Gaoming Lu (2 out of 2 patents)

Limeng Zhang (2 out of 2 patents)

4. Yandong Yang (2 out of 2 patents)

5. Jianjun Zhou (2 out of 2 patents)

6. Yanwei Zhang (1 out of 1 patent)

7. Xinpeng Hu (1 out of 1 patent)

8. Feng Li (1 out of 1 patent)

9. Li Huang (1 out of 2 patents)

10. Guohong Ren (1 out of 1 patent)

11. Wenjuan Wu (1 out of 1 patent)

12. Qingjun Zheng (1 out of 1 patent)

13. Dabing Che (1 out of 1 patent)

14. Wenhuan Cao (1 out of 1 patent)

15. Bin Chen (1 out of 1 patent)

5 patents: Sort by Forward Citations

1. 12339199 - TBM tunneling test bench for microwave-assisted rotary rock breaking (2025-06-24),

2. 12031437 - Hard rock tunnel boring machine combining microwave heating with high pressure water cutting for assisting in rock breaking (2024-07-09),

3. 11946217 - Top plate jacking device and jacking construction method configured for V-shaped columns (2024-04-02),

4. 11484912 - Active sorting muck-collecting device for slurry balancing shield (2022-11-01),

5. 11371348 - Pipeline annular self-traveling guide apparatus and method (2022-06-28),

China Railway Tunnel Group Co., Ltd. is a leading construction company specializing in tunnel engineering projects. With a strong focus on innovation and quality, the company has successfully completed numerous high-profile projects in China and abroad. CRTG's expertise in tunnel construction has earned it a reputation for excellence in the industry.

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Company Badge

USPTO Data Jan 1 1976 - Dec 23 2025

5 Patents

#99 in Guangzhou

#4,575 in China

Guangzhou, China

China Railway Tunnel Group Co., Ltd.