Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4879801 | Cathodically protected water heater | James L. Chevalier, Edwin C. Pow | 1989-11-14 |
| 4838208 | Cathodically protected water heater | James L. Chevalier, Edwin C. Pow | 1989-06-13 |