Forward Citations = 0

Loading Chart...

10 inventors (with patents filed for the assignee):

Longguan Zhang (1 out of 1 patent)

Kaifu Li (1 out of 1 patent)

Xiang Liu (1 out of 2 patents)

4. Suimei Liu (1 out of 1 patent)

5. Qibin Wang (1 out of 1 patent)

6. Yuanliang Tan (1 out of 1 patent)

7. Youxing Wu (1 out of 1 patent)

8. Mengliu Yang (1 out of 1 patent)

9. Ke Chen (1 out of 1 patent)

10. Zhaohua Liu (1 out of 2 patents)

1 patent: Sort by Forward Citations

1. 12659908 - Method and system for three dimensional positioning in subway construction site, and medium (2026-06-16),

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

1 Patents

#1,773 in Chengdu

#18,742 in China

Chengdu, China

China Railway Engineering Services Co., Ltd.

Forward Citations = 0

10 inventors:

Longguan Zhang (1 out of 1 patent)

Kaifu Li (1 out of 1 patent)

Xiang Liu (1 out of 2 patents)

4. Suimei Liu (1 out of 1 patent)

5. Qibin Wang (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: China Railway Engineering Services Co., Ltd.. Retrieved from https://idiyas.com/company/china-railway-engineering-services

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]