Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4798657 | Cathodic protection system | Otto J. Esterle | 1989-01-17 |
| 4778949 | Wire entrance fitting | Otto J. Esterle | 1988-10-18 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4798657 | Cathodic protection system | Otto J. Esterle | 1989-01-17 |
| 4778949 | Wire entrance fitting | Otto J. Esterle | 1988-10-18 |