Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5162700 | Controllable ballast and operating system utilizing same | — | 1992-11-10 |
| 4975624 | Spark gap device particularly suited for a rapid restrike circuit for metal halide lamps | Lawrence W. Speaker | 1990-12-04 |
| 4959762 | Luminaire containment means for lamp rupturing | — | 1990-09-25 |
| 4601753 | Powdered iron core magnetic devices | Lawrence W. Speaker | 1986-07-22 |
| 4601765 | Powdered iron core magnetic devices | Lawrence W. Speaker | 1986-07-22 |
| 4358816 | Roadway luminaire | — | 1982-11-09 |