Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6930490 | Traction motor fault detection system | John Ernst Nielsen Madsen | 2005-08-16 |
| 6005381 | Electrical signal phase detector | Jeffrey Cogan Nelson | 1999-12-21 |
| 5896049 | Electrical signal frequency detector | Jeffrey Cogan Nelson | 1999-04-20 |