Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12334848 | Multilayer printed circuit board dVdT filter with powder core toroids | Nicholas R Kingsbury | 2025-06-17 |
| 12267023 | Voltage doubling active single phase to three-phase power converter | Jack Yang | 2025-04-01 |
| 12009756 | Voltage doubling variable frequency drive | Jack Yang, Nicholas R Kingsbury | 2024-06-11 |
| 10931205 | Controlling an active single phase to three phase power converter | Jack Yang | 2021-02-23 |
| 10333420 | Active single phase to three phase power converter | Jack Yang | 2019-06-25 |
| 9871462 | Regenerative variable frequency drive with auxiliary power supply | Theodore Clifton Pettyjohn, Jack Yang | 2018-01-16 |
| 8941340 | Regenerative variable frequency drive | Larry G. Meiners, Theodore Clifton Pettyjohn, Jack Yang | 2015-01-27 |