Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873037 | Method for preparing an asymmetric semi-permeable membrane | C. C. Chau, Jang-hi Im, Lu H. Tung | 1989-10-10 |
OR
Otto C. Raspor
Overall (1989): #71,731 of 140,708Top 55%
1
Patents 1989