Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4851136 | Method of and apparatus for filtering a medium | Li Junwen, Yao Jixian | 1989-07-25 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4851136 | Method of and apparatus for filtering a medium | Li Junwen, Yao Jixian | 1989-07-25 |