Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4855189 | Electroluminescent lamps and phosphors | George N. Simopoulos | 1989-08-08 |
| 4853079 | Method for making electroluminescent panels | George N. Simopoulos, Gregory N. Simopoulos | 1989-08-01 |