Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4749348 | Apparatus for manufacturing an electret filter medium | Jan van Turnhout | 1988-06-07 |
| 4588537 | Method for manufacturing an electret filter medium | Jan van Turnhout | 1986-05-13 |