Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889999 | Master electrical load control system | — | 1989-12-26 |
| 4797599 | Power control circuit with phase controlled signal input | Jonathan H. Ference, Steven M. Blonstein, Robert C. Newman, Jr., Joel S. Spira | 1989-01-10 |