Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4878010 | Electric a.c power switch controller and d.c. power supply method and apparatus | — | 1989-10-31 |
| 4823067 | Energy conserving electric induction motor control method and apparatus | — | 1989-04-18 |
| 4806838 | A.C. induction motor energy conserving power control method and apparatus | — | 1989-02-21 |