Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5693598 | Low-viscosity lubricating oil and functional fluid compositions | William D. Abraham, Brent R. Dohner, John S. Manka, Stephen H. Roby | 1997-12-02 |
| 5674820 | Additive compositions for lubricants and functional fluids | John S. Manka, William D. Abraham, Stephen H. Roby, Craig D. Tipton | 1997-10-07 |