Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4999547 | Ballast for high pressure sodium lamps having constant line and lamp wattage | — | 1991-03-12 |
| 4789810 | Photocell temperature switch for high intensity discharge lamp fixture | — | 1988-12-06 |
| 4777410 | Ballast striker circuit | — | 1988-10-11 |
| 4686428 | High intensity discharge lamp self-adjusting ballast system with current limiters and a current feedback loop | Donald S. Kuhnel | 1987-08-11 |
| 4682084 | High intensity discharge lamp self-adjusting ballast system sensitive to the radiant energy or heat of the lamp | Donald S. Kuhnel | 1987-07-21 |