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Crrc Qingdao Sifang Rolling Stock Research Institute Co., Ltd.

USPTO Granted Patents = 26

CIPO Patents = 7

EPO Patents = 34

Forward Citations = 15

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170 inventors (with patents filed for the assignee):

Hui Liu (6 out of 16 patents)

Hui Ding (3 out of 4 patents)

Minghai Wang (3 out of 4 patents)

4. Lijun Zhang (3 out of 5 patents)

5. Xiangrui Li (3 out of 3 patents)

6. Xin Zhang (2 out of 8 patents)

7. Kun Wang (2 out of 7 patents)

8. Bo Zhang (2 out of 4 patents)

9. Lipeng Shao (2 out of 3 patents)

10. Kai Chen (2 out of 7 patents)

11. Baolei Hao (2 out of 2 patents)

12. Mingxing Wang (2 out of 2 patents)

13. Xiaolei Zhao (2 out of 2 patents)

14. Yanfen Xu (2 out of 2 patents)

15. Zhen Li (2 out of 2 patents)

26 patents: Sort by Forward Citations

1. 12334813 - Rectification control system, charger and control method for charger (2025-06-17),

2. 11697962 - Opening and closing mechanism and train having the same (2023-07-11),

3. 11498596 - Draft gear, coupler and draft gear and railway train (2022-11-15),

4. 11364941 - Bidirectional windage resistance brake apparatus (2022-06-21),

5. 11101741 - Parallel control method and system for single-phase inverters and inverter (2021-08-24),

6. 10825615 - Hard-shell flexibly-packaged capacitor module and system (2020-11-03),

7. 10655381 - Locking device and opening and closing mechanism having the same (2020-05-19),

8. 10611386 - Threaded interface buffer with anti-rotation structure (2020-04-07),

9. 10480551 - Traction control system for electric multiple units (2019-11-19),

10. 10345197 - Loading test test-and-control system and method of vehicle lifter lifting unit (2019-07-09),

11. 10246110 - Heavy freight train marshalling device and marshalling method, and electronically controlled pneumatic brake system (2019-04-02),

12. 10203962 - Tigersharc DSP boot management chip and method (2019-02-12),

13. 10189489 - Offline variable monitoring system and method for MPUs of an EMU train (2019-01-29),

14. 10147292 - Train smoke and fire alarm communication method based on independent modules combination and 3U chassis structure (2018-12-04),

15. 10097024 - Control system and control method for a phase shifted full bidge charger (2018-10-09),

CRRC Qingdao Sifang Rolling Stock Research Institute Co., Ltd. is a leading Chinese company in the field of rolling stock research and development. They specialize in designing, manufacturing, and testing various types of rolling stock, including metro trains, high-speed trains, and locomotives. With advanced technology and a strong focus on innovation, CRRC Qingdao Sifang has become a trusted provider of cutting-edge solutions for the global rail transportation industry.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

26 Patents

#18 in Qingdao

#1,038 in China

#24,051 in the World

Crrc Qingdao Sifang Rolling Stock Research Institute Co., Ltd.

Forward Citations = 15

170 inventors:

Hui Liu (6 out of 16 patents)

Hui Ding (3 out of 4 patents)

Minghai Wang (3 out of 4 patents)

4. Lijun Zhang (3 out of 5 patents)

5. Xiangrui Li (3 out of 3 patents)

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