Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 4405867 | System for transferring a load between two power sources without interruption of power to the load | Ralph H. Ringstad | 1983-09-20 | $2,040,000 |
| 4189649 | Control panel for automatic transfer switch | Walter Przywozny | 1980-02-19 | $1,083,000 |