Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874411 | Air filtering mechanism | Paul E. M. Snauwaert, Geert Vergote | 1989-10-17 |
DW
Daniel C. Witdoek
Overall (1989): #121,278 of 140,708Top 90%
1
Patents 1989