Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7452472 | Grease interceptor having a grease removal device | Ronghua Zhou, Craig Swider, Barry Hodgekins | 2008-11-18 |
| 6776900 | Level measurement for grease separators | Niel Mazurek, Charles Tevis | 2004-08-17 |
| 5982861 | Electronic directory and entry control system | Charles Tevis, Niel Mazurek, Joseph G. Gangi, Mark Schwandt | 1999-11-09 |