Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7202730 | Voltage to current to voltage cell voltage monitor (VIV) | Thomas T. Sack | 2007-04-10 |
| 5270635 | Universal battery charger | Douglas R. Frey | 1993-12-14 |
| 5266881 | Universal high current battery charger | Douglas R. Frey | 1993-11-30 |
| 5113127 | Universal battery charger | Douglas R. Frey | 1992-05-12 |