Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7078910 | Fluid formulation evaluation and improvement utilizing broad spectrum impedance spectroscopy | Richard W. Hirthe, Jianxun Hu, Martin A. Seitz, David R. Sosnowski, Ronald Mark Johnson +2 more | 2006-07-18 |
| 7043372 | Fluid condition monitoring using broad spectrum impedance spectroscopy | David L. Wooton, David R. Sosnowski, Richard W. Hirthe | 2006-05-09 |
| 6844745 | Method of determining the fluid condition of diesel engine lubricant during real time operation | Steven R. Schachameyer, Anne Matthews Brunson, Victor E. Shtaida, Lian Q. Zou, Richard W. Hirthe | 2005-01-18 |
| 6839620 | Detecting soot during real time operation in diesel engine lubricant | Richard W. Hirthe, Martin A. Seitz | 2005-01-04 |
| 5680055 | Method and apparatus to sense changes in the state of a resin bed | Martin A. Seitz, Richard W. Hirthe, Patrick J. Dupies, Don Vaughan | 1997-10-21 |