Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6098575 | Coolant filter with coolant additive sensor | Edward H. Howell, III | 2000-08-08 |
| 5647305 | Resettable coolant additive maintenance sensor | Edward H. Howell, III, Alan P. Haag | 1997-07-15 |