Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5350443 | Filter sheet material for passenger cabins in motor vehicles | Ernest De Ruiter | 1994-09-27 |
| 5277963 | Filter sheet material | Ernest De Ruiter | 1994-01-11 |
| 5275154 | Activated charcoal filter layer for gas masks | Ernest De Ruiter | 1994-01-04 |