Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6674249 | Resistively ballasted gaseous discharge lamp circuit and method | — | 2004-01-06 |
| 5896013 | Operating circuit for an inductively ballasted arc discharge lamp | — | 1999-04-20 |
| 4987347 | Lamp driver circuit | John M. Davenport, Joseph M. Allison | 1991-01-22 |
| 4904907 | Ballast circuit for metal halide lamp | Joseph M. Allison, Richard L. Hansler, Park French, John M. Davenport | 1990-02-27 |
| 4584499 | Autoresonant piezoelectric transformer signal coupler | John M. Davenport, Orvar B. Burman | 1986-04-22 |
| 4574219 | Lighting unit | John M. Davenport, Richard L. Hansler, Ralph M. Potter, John M. Blank, Dimitri M. Speros +2 more | 1986-03-04 |
| 4555647 | Ballast circuit for gas discharge tubes utilizing time-pulse additions | John M. Davenport, Pieter J. von Herrmann | 1985-11-26 |