Issued Patents All Time
Showing 26–36 of 36 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4454450 | Vertical running, high brightness, low wattage metal halide lamp | George J. English, Harold L. Rothwell, Jr. | 1984-06-12 |
| 4415829 | Direct current operable arc lamp | Harold L. Rothwell, Jr., George J. English | 1983-11-15 |
| 4386292 | Projection lamp comprising single ended arc discharge lamp and an interference filter | Harold L. Rothwell, Jr., George J. English | 1983-05-31 |
| 4383197 | Metal halide arc discharge lamp having shielded electrode | W. Calvin Gungle, Dale E. Work | 1983-05-10 |
| 4321501 | Low wattage, high pressure metal vapor discharge lamp for minimizing detrimental glow time | George J. English, Harold L. Rothwell, Jr. | 1982-03-23 |
| 4321504 | Low wattage metal halide arc discharge lamp | Harold L. Rothwell, Jr., John A. Scholz | 1982-03-23 |
| 4320322 | Electrode geometry to improve arc stability | Harold L. Rothwell, Jr., W. Calvin Gungle | 1982-03-16 |
| 4308483 | High brightness, low wattage, high pressure, metal vapor discharge lamp | Harold L. Rothwell, Jr., George J. English, W. Calvin Gungle | 1981-12-29 |
| 4302699 | Low wattage metal halide arc discharge lamp having optimum efficacy | Harold L. Rothwell, Jr. | 1981-11-24 |
| 4278910 | High pressure arc discharge lamp having concave shaped outer jacket | David R. Brown | 1981-07-14 |
| 4277714 | Metal halide arc discharge lamp having coiled coil electrodes | Frederic Koury, W. Calvin Gungle | 1981-07-07 |