Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5089760 | DC bus voltage regulation by controlling the frequency in a variable frequency inverter | — | 1992-02-18 |
| 4308491 | Automatic fault protection system for power recovery control | Julius Michael Liptak, Richard W. Roof, Kenneth Stephen Berton | 1981-12-29 |