QD

Qingfeng Dai

Overall (All Time): #1,120,977 of 4,157,543Top 30%
4
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
11542719 Flexible connecting structure of prefabricated component and building main body Hao A. Chen, Weichao Chen, Weijun Tang, Mingliang Zhang, Tuo Shi +3 more 2023-01-03
D947467 Dog leash handle Ying Tang 2022-03-29
11134657 Pet leash preventing locking due to jerk Wenwei Tang, Yingzhou Chen, Di Fang, Ying Tang 2021-10-05
10834903 Double rope pet leash Wenwei Tang, Yingzhou Chen, Zhaoxin Wu, Ying Tang 2020-11-17