Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5702535 | Dry cleaning and degreasing system | Donald J. Gray | 1997-12-30 |
| 5630434 | Filter regeneration system | Donald J. Gray | 1997-05-20 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5702535 | Dry cleaning and degreasing system | Donald J. Gray | 1997-12-30 |
| 5630434 | Filter regeneration system | Donald J. Gray | 1997-05-20 |