Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4929374 | Lubricating oil composition | Feike De Jong, Jacob Vermeule | 1990-05-29 |
WD
Willem Dannenberg
Overall (All Time): #3,903,928 of 4,157,543Top 95%
1
Patents All Time