Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5692461 | Apparatus and method for removing cations and anions from an engine coolant liquid | John P. Crovato, Ferdinand J. Crovato, Robert L. Felton, Harold E. Erwin | 1997-12-02 |