Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D646409 | Light bulb | Michael MacDonald, Jian Li, Yanqing Xie, Gary R. Allen | 2011-10-04 |
| 5670840 | Tungsten-halogen incandescent lamp with reduced risk of containment failure | Frank E. Zalar, Ronald J. Olwert | 1997-09-23 |
| 5506471 | Low glare infrared light source | Walter J. Kosmatka | 1996-04-09 |
| 4751426 | Fluorescent lamp using multi-layer phosphor coating | Mary V. Hoffman | 1988-06-14 |
| 4316120 | Circular fluorescent lamp unit | Ronald N. Cotman | 1982-02-16 |