Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5173848 | Motor controller with bi-modal turnoff circuits | — | 1992-12-22 |
| 4843533 | Transient ride-through AC inverter | G. Marshall Horne | 1989-06-27 |
| 4791350 | Current regulated switching regulator for gating gate turnoff devices | — | 1988-12-13 |
| 4720776 | DC bus shorting apparatus and method for polyphase AC inverter | John C. Guyeska, J. Michael Liptak | 1988-01-19 |
| 4441063 | Pulse generating system | Kenneth Stephen Berton | 1984-04-03 |
| 4308491 | Automatic fault protection system for power recovery control | F. Carl Joyner, Jr., Julius Michael Liptak, Kenneth Stephen Berton | 1981-12-29 |
| 4267493 | Pre-step timer circuit for DC motor control | — | 1981-05-12 |
| 4249118 | Control system for multiple speed motor | — | 1981-02-03 |