This inventor holds 1 USPTO granted patent and 5 published patent applications and 1 EPO patent. Top assignees: Cg Rail—chinesisch-Deutsches Forschungs—und Entwicklungszentrum Für Bahn—und Verkehrstechnik Dresden Gmbh, Crrc Qingdao Sifang Co., Ltd.. Active years: 2026.
Company Filing History:
1 out of 7 
1 out of 92 Years Active: 2026
Title: Kejian Liu - Innovator in Railway Technology
Introduction
Kejian Liu is an inventor based in Qingdao, China, known for his contributions to railway technology. He has worked with notable companies such as CRRC Qingdao Sifang Co., Ltd. and CG Rail—Chinesisch-Deutsches Forschungs— und Entwicklungszentrum für Bahn— und Verkehrstechnik Dresden GmbH. Although he currently holds no granted patents, his work in the field is significant.
Latest Patent Applications
Kejian Liu's latest patent application is titled "Bogie for a Railway Vehicle with Roll Stabiliser." This invention relates to a bogie for a rail vehicle characterized by a high lightweight construction potential. The bogie features a torsion spring system in which a roll stabilizer is arranged in a torsionally movable manner. The roll stabilizer can be articulated to the car body of the rail vehicle or to the torsion spring system. This innovative bogie design provides a particularly large installation space for built-in components.
Conclusion
Kejian Liu's work in railway technology showcases his innovative spirit and dedication to improving rail vehicle design. His contributions, although not yet reflected in granted patents, highlight the potential for future advancements in the industry.