Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6203392 | Single ended quartz projection lamp | Donald E. Hatfield | 2001-03-20 |
| 6011353 | Design and cooling of single ended quartz projection lamps | Donald E. Hatfield | 2000-01-04 |
| 5754005 | Electric lamps containing electrical leads of a molybdenum and tungsten alloy | George E. Sakoske, Wayne A. Lasch, Joseph M. Ranish, Milan R. Vukcevich, Thomas H. Yu +4 more | 1998-05-19 |
| 5680003 | Coiled-coil filament design for an incandescent lamp | Robert W. Hartwick, Robert J. Kellner, Joseph P. Lagermasini, III | 1997-10-21 |
| 5187405 | Double filament incandescent lamp | Richard C. LeCrone, Michael W. Bowen | 1993-02-16 |