Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5885942 | Multifunctional lubricant additive | Ruiming Zhang | 1999-03-23 |
| 5700765 | Additive system and method for extending the service life of petroleum based hydraulic fluids | John F. Barnes, Karl N. Gutzke | 1997-12-23 |