Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885518 | Induction motor torque/flux control system | — | 1989-12-05 |
| 4862054 | Tacho-less vector control adaptive system for motor drive | — | 1989-08-29 |
| 4833588 | Direct AC/AC converter system | — | 1989-05-23 |
| 4814964 | Variable speed a-c drive | John Rosa, Theodore M. Heinrich | 1989-03-21 |
| 4805082 | Regenerative two-quadrant converter | Theodore M. Heinrich | 1989-02-14 |