Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4833628 | Up to speed detector for an electric motor using measured values of the current lag; and voltage ramp controller using the up to speed indication | — | 1989-05-23 |
| 4823226 | Phase loss detection circuit including transient protection | Ryan T. Reed | 1989-04-18 |