Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6902082 | Manhole device | Donald R. McAllister | 2005-06-07 |
| 6884325 | Sealable lid for vacuum distillation apparatus | Donald R. McAllister | 2005-04-26 |
| 6666464 | Containment cart for solvent recovery system | Donald R. McAllister | 2003-12-23 |
| 6352618 | Modular solvent recovery device | Donald R. McAllister | 2002-03-05 |