Patents
.us
Search
Marketplace
Patent My Idea
Patents
/
Assignees
Beijing Zehua Chemical Engineering Co., Ltd.
2 patents in portfolio
US11938425
utility
2024
Multi-bubbling Region Column Tray and Corresponding Plate Column
0 cites
US11547952
utility
2023
Multi-bubbling Region Column Tray and Corresponding Plate Column
0 cites