Issued Patents All Time
Showing 25 most recent of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6798139 | Three electrode ceramic metal halide lamp | Raghu Ramaiah | 2004-09-28 |
| 6781295 | One piece clip for mounting light source to reflector | Matthew A. Bugenske | 2004-08-24 |
| 6741013 | Shrouded electric lamp having functionally distinguishable center supports | Mark E. Duffy, Curtis E. Scott | 2004-05-25 |
| 6731068 | Ceramic metal halide lamp | James A. Leonard, Stuart A. Mucklejohn, Gergely Ormandlaky | 2004-05-04 |
| 6731067 | Elimination of weld in ceramic metal halide electrode-leadwire | James R. Woodward | 2004-05-04 |
| 5675677 | Lamp-to-light guide coupling arrangement for an electrodeless high intensity discharge lamp | John M. Davenport, Mark E. Duffy, Richard L. Hansler, Kenneth S. King, William J. Cassarly +3 more | 1997-10-07 |
| 5610469 | Electric lamp with ellipsoidal shroud | Rolf S. Bergman, Thomas G. Parham | 1997-03-11 |
| 5479072 | Low mercury arc discharge lamp containing neodymium | Tommie Edward Berry, Mark E. Duffy, Timothy D. Russell | 1995-12-26 |
| 5378965 | Luminaire including an electrodeless discharge lamp as a light source | Lawrence W. Speaker, Mark E. Duffy, Raymond A. Heindl | 1995-01-03 |
| 5373216 | Electrodeless arc tube with stabilized condensate location | Mark E. Duffy | 1994-12-13 |
| 5363015 | Low mercury arc discharge lamp containing praseodymium | Tommie Edward Berry, Mark E. Duffy, Timothy D. Russell | 1994-11-08 |
| 5306987 | Acoustic resonance arc stabilization arrangement in a discharge lamp | Mark E. Duffy | 1994-04-26 |
| 5258691 | Metal halide lamp having improved operation acoustic frequencies | Kenneth S. King, Gary R. Allen | 1993-11-02 |
| 5248918 | Starting aid for an electrodeless high intensity discharge lamp | Mark E. Duffy, Raymond A. Heindl | 1993-09-28 |
| 5214357 | Low-loss L-C drive circuit for an electrodeless high intensity discharge lamp | Mark E. Duffy, Raymond A. Heindl, Victor A. Levand, Jr. | 1993-05-25 |
| 5213537 | Method for dosing a discharge lamp with mercury | Victor D. Roberts, Walter R. Champman, Jr., Bernard F. Fenoglio | 1993-05-25 |
| 5151633 | Self-extinguishing gas probe starter for an electrodeless high intensity discharge lamp | George A. Farrall, John P. Cocoma, Mark E. Duffy, Tommie Edward Berry | 1992-09-29 |
| 5150015 | Electrodeless high intensity discharge lamp having an intergral quartz outer jacket | Raymond A. Heindl, Mark E. Duffy, Harald L. Witting, Richard C. Nagle, Lawrence T. Mazza | 1992-09-22 |
| 5140227 | Starting aid for an electrodeless high intensity discharge lamp | Mark E. Duffy, Raymond A. Heindl | 1992-08-18 |
| 5128589 | Heat removing means to remove heat from electric discharge lamp | — | 1992-07-07 |
| 5095249 | Gas probe starter for an electrodeless high intensity discharge lamp | Victor D. Roberts, Mark E. Duffy, Raymond A. Heindl | 1992-03-10 |
| 4872741 | Electrodeless panel discharge lamp liquid crystal display | Sayed-Amr El-Hamamsy | 1989-10-10 |
| 4810938 | High efficacy electrodeless high intensity discharge lamp | Peter D. Johnson, John M. Anderson | 1989-03-07 |
| 4783615 | Electrodeless high pressure sodium iodide arc lamp | — | 1988-11-08 |
| 4757236 | High pressure metal halide arc lamp with xenon buffer gas | Peter D. Johnson | 1988-07-12 |