Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4841196 | Two-filament lamp and operating circuit and method for designing same | — | 1989-06-20 |
| 4812714 | Arc discharge lamp with electrodeless ultraviolet radiation starting source | William M. Keeffe, Gregory Zaslavsky | 1989-03-14 |