Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7132833 | System for detecting defective battery packs | Craig Edevold, Cary Winch, Donald K. Zahrte, Sr. | 2006-11-07 |
| 6310783 | Modular method and apparatus for building an uninterruptible power system (UPS) | Cary Winch, Craig Edevold | 2001-10-30 |
| 6266260 | Inverter having center switch and uninterruptible power supply implementing same | Donald K. Zahrte, Sr., Frederick A. Stich, Douglas C. Folts | 2001-07-24 |
| 5619076 | Method and apparatus for connection and disconnection of batteries to uninterruptible power systems and the like | Michael J. Cane, Robert Bishop | 1997-04-08 |
| 5602462 | Uninterruptible power system | Frederick A. Stich, Thomas Hubert, Donald K. Zahrte, Sr. | 1997-02-11 |
| 5182518 | Inverter and battery testing for uninterruptible power systems | Frederick A. Stich, Richard V. Baxter, Jr., Herbert A. Podewils | 1993-01-26 |
| 5001399 | Power supply for vacuum fluorescent displays | — | 1991-03-19 |
| 4717996 | Gated parallel power switching devices protection circuit | Robert F. Bourke, Richard I. Cook | 1988-01-05 |
| 4692854 | Method and apparatus for modulating inverter pulse width | Richard V. Baxter, Jr., Robert F. Bourke, David R. Ellingson, Terrance D. Paul | 1987-09-08 |