Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7078910 | Fluid formulation evaluation and improvement utilizing broad spectrum impedance spectroscopy | Richard W. Hirthe, Jianxun Hu, Charles Koehler, Martin A. Seitz, David R. Sosnowski +2 more | 2006-07-18 |
| 6844745 | Method of determining the fluid condition of diesel engine lubricant during real time operation | Steven R. Schachameyer, Victor E. Shtaida, Lian Q. Zou, Charles Koehler, Richard W. Hirthe | 2005-01-18 |