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25 inventors (with patents filed for the assignee):

Yong Jiang (4 out of 23 patents)

Shujun Zhang (4 out of 6 patents)

Jiawei Wang (3 out of 7 patents)

4. Xiaoyu Han (2 out of 2 patents)

5. Yu Bai (2 out of 8 patents)

6. Yongqing Gao (2 out of 2 patents)

7. Fangbo Bao (2 out of 2 patents)

8. Wei Wang (1 out of 479 patents)

9. Yao Liu (1 out of 48 patents)

10. Lijun Zhao (1 out of 90 patents)

11. Shuai Zhang (1 out of 38 patents)

12. Tong Li (1 out of 59 patents)

13. Dan Zhao (1 out of 1 patent)

14. Gangxin Chen (1 out of 1 patent)

15. Jianming Huang (1 out of 8 patents)

5 patents: Sort by Forward Citations

1. 12454477 - Method and system for enhanced culture of aerobic granular sludge (2025-10-28),

2. 12398056 - Sewage treatment system and method of continuous flow step-feed short-cut denitrification-anaerobic ammonia oxidation coupled with denitrification (2025-08-26),

3. 11858838 - Sewage uniform distribution treatment device for aerobic granular sludge system and use method therefor (2024-01-02),

4. 11702354 - Bacterium-alga coupled sewage treatment device based on energy recycling and use method thereof (2023-07-18),

5. 11339069 - Anaerobic ammoxidation synergistic nitrogen removal process device of municipal sewage main and side streams and application method thereof (2022-05-24),

Beijing Drainage Group Co., Ltd is a leading enterprise in the field of urban drainage and sewage treatment in China. Established to address the growing challenges of urban water management, the company specializes in the design, construction, and operation of drainage systems and wastewater treatment facilities. With a commitment to sustainable development, Beijing Drainage Group integrates advanced technologies and innovative solutions to enhance urban water quality and environmental protection. The company plays a crucial role in improving the living standards of urban residents by ensuring efficient water management and promoting ecological balance.

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USPTO Data Jan 1 1976 - Dec 30 2025

5 Patents

#418 in Beijing

#4,587 in China

Beijing, China

Beijing Drainage Group Co., Ltd