Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4363682 | Process for the superficial treatment of a fibrous filtering layer, which is non-woven and highly aerated, forming electret | — | 1982-12-14 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4363682 | Process for the superficial treatment of a fibrous filtering layer, which is non-woven and highly aerated, forming electret | — | 1982-12-14 |