Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6402819 | Fresh air filter | Ernest De Ruiter | 2002-06-11 |
| 6227383 | Filtering material and process for the production thereof, and adsorption filter produced from said filtering material | Ernest De Ruiter | 2001-05-08 |