Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4847533 | Low pressure mercury discharge fluorescent lamp utilizing multilayer phosphor combination for white color illumination | — | 1989-07-11 |
| 4806824 | Fluorescent lamp using multi-layer phosphor coating | John D. Paynter, George R. Gillooly, Thomas F. Soules | 1989-02-21 |