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| Number | Title | Issue Date |
| 5686854 | Isolated driver circuit for high frequency solid-state switches A driver circuit for high frequency transistor type switches, comprising two sections; a positive (+) drive and a negative (-) drive, both sections being supplied with a high frequency signal by a square wave oscillator source. The sections are connected ... | 11/11/1997 |
| 5561595 | Power inverter with input line conditioning A three-phase ac power inverter incorporating circuits which operate to correct input power factor to near unity when connected to an ac input rectifier, while also reducing input harmonic distortion. The inverter includes a dc capacitor connected between... | 10/01/1996 |
