Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5238085 | Engine oil makeup and extended operation oil exchange system | — | 1993-08-24 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5238085 | Engine oil makeup and extended operation oil exchange system | — | 1993-08-24 |