Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4855049 | Microporous membrane obtained by the irradiation of two faces and process for obtaining the same | Marcel Toulemonde | 1989-08-08 |
| 4832997 | Production of asymmetrical microporous membranes by double irradiation and asymmetrical membranes | Claude Bieth | 1989-05-23 |