Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5213696 | Automatic dewaxing filter washing system and method | John Martin, Kevin Lyon, Charles W. Harrison | 1993-05-25 |
| 4885062 | Lube oil solvent dewaxing control system | Charles W. Harrison, Michael J. Gerondale, James O. Y. Ong | 1989-12-05 |