Issued Patents All Time
Showing 26–47 of 47 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4847530 | Arc discharge lamp with elongated outer envelope orthogonal to lamp base | George J. English | 1989-07-11 |
| 4766348 | Single-ended metal halogen lamp and fabrication process employing ionization potential selection of additive gases | George J. English, Mark D. Beschle | 1988-08-23 |
| 4636687 | Electrode alignment and capsule design for single-ended low wattage metal halide lamps | William M. Keeffe, W. Calvin Gungle, Zeya K. Krasko | 1987-01-13 |
| 4620130 | Electrode alignment and capsule design for single-ended low wattage metal halide lamps | William M. Keeffe, W. Calvin Gungle, Zeya K. Krasko | 1986-10-28 |
| 4612000 | Single-ended metal halide discharge lamps and process of manufacture | George J. English | 1986-09-16 |
| 4580989 | Metal halide arc discharge lamp with means for suppressing convection currents within the outer envelope and methods of operating and constructing same | Timothy Fohl, William M. Keeffe | 1986-04-08 |
| 4557700 | Metal halide discharge lamp gas fill process to provide minimal color separation | George J. English | 1985-12-10 |
| 4540373 | Method of fabricating an arc tube for an arc discharge lamp | George J. English | 1985-09-10 |
| 4528478 | Single-ended metal halide discharge lamp with minimal color separation | George J. English | 1985-07-09 |
| 4499396 | Metal halide arc discharge lamp with means for suppressing convection currents within the outer envelope and methods of operating same | Timothy Fohl, William M. Keeffe | 1985-02-12 |
| 4454450 | Vertical running, high brightness, low wattage metal halide lamp | George J. English, William M. Keeffe | 1984-06-12 |
| 4415829 | Direct current operable arc lamp | George J. English, William M. Keeffe | 1983-11-15 |
| 4390811 | High intensity discharge lamp including arc extinguishing means | W. Calvin Gungle, Alan Daignault | 1983-06-28 |
| 4386292 | Projection lamp comprising single ended arc discharge lamp and an interference filter | William M. Keeffe, George J. English | 1983-05-31 |
| 4376259 | High intensity discharge lamp including arc extinguishing means | Robert S. White | 1983-03-08 |
| 4362969 | High intensity discharge lamp including arc extinguishing means | W. Calvin Gungle | 1982-12-07 |
| 4348615 | Discharge lamp operating circuit | Robert L. Garrison | 1982-09-07 |
| 4321501 | Low wattage, high pressure metal vapor discharge lamp for minimizing detrimental glow time | George J. English, William M. Keeffe | 1982-03-23 |
| 4321504 | Low wattage metal halide arc discharge lamp | William M. Keeffe, John A. Scholz | 1982-03-23 |
| 4320322 | Electrode geometry to improve arc stability | William M. Keeffe, W. Calvin Gungle | 1982-03-16 |
| 4308483 | High brightness, low wattage, high pressure, metal vapor discharge lamp | William M. Keeffe, George J. English, W. Calvin Gungle | 1981-12-29 |
| 4302699 | Low wattage metal halide arc discharge lamp having optimum efficacy | William M. Keeffe | 1981-11-24 |