Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6953534 | Engine antifreeze composition | — | 2005-10-11 |
| 6733687 | Hybrid supplemental coolant additive | — | 2004-05-11 |
| RE37369 | Slow release coolant filter | Charles L. Matheson | 2001-09-18 |
| 5772873 | Slow release coolant filter | Charles L. Matheson | 1998-06-30 |
| 5662799 | Slow release coolant filter | Charles L. Matheson | 1997-09-02 |