Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6249077 | Arc tube, mounting member and electric lamp assembly | Randall D. Brown, Joseph C. Swadel, Edward H. Nortrup | 2001-06-19 |
| 5834897 | Lamp with centered electrode or in-lead | Edward H. Nortrup, Pierre G. Provost | 1998-11-10 |
| 5327042 | Metal halide lamp | Richard A. Parrott, Edward H. Nortrup | 1994-07-05 |
| 5298876 | Bi-metallic switch element | Joseph S. Kulik, Robert Vincent | 1994-03-29 |
| 5252885 | Metal halide arc discharge lamp assembly | Martin E. Muzeroll, Norman A. Mathieu, Ronald C. Lekebusch, Edward H. Nortrup | 1993-10-12 |
| 5187416 | Arc discharge lamp with a vertical thermal switch extending between the lamp stem and inner neck wall | — | 1993-02-16 |
| 5136204 | Metal halide arc discharge lamp assembly | Martin E. Muzeroll, Norman A. Mathieu, Ronald C. Lekebusch, Edward H. Nortrup | 1992-08-04 |
| 5051657 | Safety filament assembly for double-enveloped arc discharge lamp | Martin E. Muzeroll | 1991-09-24 |
| 4950954 | Metal halide discharge lamp with electrodes having unequal thoria contents | Edmund M. Passmore, Robert J. Karlotski | 1990-08-21 |
| 4888517 | Double-enveloped lamp having a shield surrounding a light-source capsule within a thick-walled outer envelope | William M. Keeffe, Robert J. Karlotski, Joseph S. Kulik | 1989-12-19 |