Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5322621 | Equipment for treating sewage by biological oxidation | Fenglin Yang | 1994-06-21 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5322621 | Equipment for treating sewage by biological oxidation | Fenglin Yang | 1994-06-21 |