Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11381076 | AC controlled relay drive circuit | — | 2022-07-05 |
| 7132833 | System for detecting defective battery packs | David L. Layden, Craig Edevold, Cary Winch | 2006-11-07 |
| 7068861 | Device and method for inspecting markings | Mark R. Swanson, William C. Apperson | 2006-06-27 |
| 6605879 | Battery charger control circuit and an uninterruptible power supply utilizing same | Joseph R. Wade, Glenn A. Koosmann | 2003-08-12 |
| 6292379 | Distributed internal fault bypass in a modular uninterruptible power supply | Craig Edevold, Cary Winch, Joseph R. Wade, Peter William Jungwirth, Derek Laufenberg | 2001-09-18 |
| 6266260 | Inverter having center switch and uninterruptible power supply implementing same | David L. Layden, Frederick A. Stich, Douglas C. Folts | 2001-07-24 |
| 6218744 | Uninterruptible power supply and ferroresonant transformer for use therewith | Peter William Jungwirth | 2001-04-17 |
| 5790391 | Standby power system | Frederick A. Stich, Peter William Jungwirth | 1998-08-04 |
| 5729120 | Dynamic voltage regulation stabilization for AC power supply systems | Frederick A. Stich, Gregory C. Kohls, Robert R. Davidson | 1998-03-17 |
| 5602462 | Uninterruptible power system | Frederick A. Stich, Thomas Hubert, David L. Layden | 1997-02-11 |
| 5315533 | Back-up uninterruptible power system | Frederick A. Stich, Richard V. Baxter, Jr., Douglas C. Folts, Thomas Hubert, Juan Manuel Medina +2 more | 1994-05-24 |