Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6542023 | AC transfer switch using semiconductor devices | Timothy C. Daun-Lindberg, Charles J. Pentek, Jon Anton Veer | 2003-04-01 |
| 6430692 | Series-parallel battery array conversion | Christopher John Kimble | 2002-08-06 |
| 6278279 | Path test for a DC battery back-up system | Timothy C. Daun-Lindberg | 2001-08-21 |
| 6181029 | Method of controlling battery back-up for multiple power supplies | Neil Clair Berglund, Patrick K. Egan, John V. Swenson | 2001-01-30 |
| 5646509 | Battery capacity test and electronic system utilizing same | Neil Clair Berglund, Todd J. Rosedahl | 1997-07-08 |
| 5633572 | Back-up power supply with replaceable battery pack | Vernon J. Kleve, Willard J. Olson, Gary Allen Thompson | 1997-05-27 |
| 5617007 | Battery charging method and apparatus using current control | Steven D. Keidl, Jeffrey S. Rotter | 1997-04-01 |