Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4797366 | Gas treatment and resin regeneration process | Edward D. A. Obeng | 1989-01-10 |
CL
Constant J. van Lookeren-Campagne
Overall (1989): #124,420 of 140,708Top 90%
1
Patents 1989