Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5272407 | Electric lamp having screens for reducing photo electron emission | Nancy Tillman, Dale E. Work | 1993-12-21 |
| 5225738 | Metal halide lamp with improved lumen output and color rendition | Raghu Ramaiah | 1993-07-06 |