Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7408757 | Low voltage surge protectors with ground shield | John W. Chappie, Hung Van Tu | 2008-08-05 |
| 4553591 | Oil well drilling apparatus | — | 1985-11-19 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7408757 | Low voltage surge protectors with ground shield | John W. Chappie, Hung Van Tu | 2008-08-05 |
| 4553591 | Oil well drilling apparatus | — | 1985-11-19 |