Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4965128 | Biodegradable polymer substrates loaded with active substance suitable for the controlled release of the active substance by means of a membrane | Pieter J. Greidanus, Jan Feijen, Marinus J. D. Eenink, Jan Olijslager, Jan H. M. Albers | 1990-10-23 |
| RE31285 | Method for manufacturing a filter of electrically charged electret fiber material and electret filters obtained according to said method | Jan van Turnhout | 1983-06-21 |