Qiqihar, China

Hongji Sun

This inventor holds 1 USPTO granted patent. Top assignees: Mudanjiang Jinyuan Coupler and Draft Gear Manufacturing Co., Ltd., Qiqihar Railway Rolling Stock Co., Ltd.. Active years: 2013.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hongji Sun. Retrieved from https://idiyas.com/inventor/hongji-sun

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


% Patents Active = 100.0

Average Co-Inventor Count = 7.0

ph-index = 1

Forward Citations = 2(Granted Patents)


Company Filing History:


Years Active: 2013

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1 patent (USPTO):Explore Patents

Title: Innovations by Hongji Sun in Coupler Technology

Introduction

Hongji Sun is a notable inventor based in Qiqihar, China. He has made significant contributions to the field of coupler technology, particularly with his innovative designs that enhance the functionality and efficiency of coupler systems.

Latest Patents

Hongji Sun holds a patent for a "Coupler draft gear, double-side operating coupler and lower lockpin rotation shaft assembly." This invention includes a lower lockpin rotation shaft body, which features a first coupler lifting bar hole at its outer end and a connecting key in its intermediate portion. The assembly also comprises a lower lockpin rotation shaft bush, which has a second coupler lifting bar hole at its outer end and is operatively connected to the lower lockpin rotation shaft body. The design further incorporates two coupler lifting bars and two coupler lifting bar seats, enhancing the operational capabilities of the coupler system.

Career Highlights

Throughout his career, Hongji Sun has worked with prominent companies in the railway industry. He has been associated with Qiqihar Railway Rolling Stock Co., Ltd. and Mudanjiang Jinyuan Coupler and Draft Gear Manufacturing Co., Ltd. His experience in these organizations has contributed to his expertise in coupler technology.

Collaborations

Hongji Sun has collaborated with several professionals in his field, including Qingmin Meng and Long Chen. These partnerships have likely facilitated the development and refinement of his innovative designs.

Conclusion

Hongji Sun's contributions to coupler technology demonstrate his commitment to innovation and improvement in the railway sector. His patent reflects a deep understanding of mechanical systems and a drive to enhance operational efficiency.

Profile summary based on public USPTO records.
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]
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