YC

Yongqing Chen

OE Otis Elevator: 1 patents #966 of 1,840Top 55%
Overall (All Time): #1,784,761 of 4,157,543Top 45%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
D1047439 Trolley case 2024-10-22
9637351 Conveyor band drive system Du Dai, Jian Cheng, Yongbo Zhang, Fengshu Yue, Huisheng Zheng +1 more 2017-05-02