Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6380746 | Monitoring fluid condition with a spiral electrode configuration | Mark H. Polczynski, Paul G. Rops, Martin A. Seitz, Richard W. Hirthe | 2002-04-30 |
| 6278281 | Fluid condition monitor | Richard W. Hirthe, Mark H. Polczynski, Martin A. Seitz, James E. Hansen | 2001-08-21 |