Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7894169 | High resistance ground protection employing AC drive characteristics | Carlos Rodriguez Valdez, Russel J. Kerkman, Jeffrey D. McGuire, Nickolay N. Guskov | 2011-02-22 |
| 6050258 | Exhaust fan with dry lubricant coating | Emery W. Neitzel, Arnold S. Heil, Joseph A. Knoedler | 2000-04-18 |
| 5809993 | Exhaust fan with dry lubricant coating | Emery W. Neitzel, Arnold S. Heil, Joseph A. Knoedler | 1998-09-22 |