Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5447628 | Reconstituting lubricating oil | Charles W. Harrison, Robert M. Steinberg, Bruce R. Bond | 1995-09-05 |
| 5306419 | Used lubricating oil reclaiming | Charles W. Harrison, Robert M. Steinberg, Bruce R. Bond | 1994-04-26 |