Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5615129 | Method and apparatus for adaptive and corrective determination of battery run-time in uninterruptible power systems | Frederick A. Stich, Timothy Walsh | 1997-03-25 |
| 5602462 | Uninterruptible power system | Frederick A. Stich, David L. Layden, Donald K. Zahrte, Sr. | 1997-02-11 |