Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6476723 | Insulating oil leak containment | David C. Campbell, Johnny James Clark | 2002-11-05 |
| 6052060 | Temperature monitor for electrical switchgear | Johnny James Clark | 2000-04-18 |
| 5691706 | Transformer leak alarm | Johnny James Clark | 1997-11-25 |