Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5610448 | Universal switching device and method for lighting applications | — | 1997-03-11 |
| 4981764 | Method of providing a indication signal to indicate a level of electrolyte in a wet cell | — | 1991-01-01 |
| 4978592 | Universal electrolyte level indicator for wet cell batteries | — | 1990-12-18 |
| 4913987 | Universal electrolyte level indicator for wet cell batteries | — | 1990-04-03 |
| 4677426 | Dust detecting ring assembly | — | 1987-06-30 |
| 4622496 | Energy efficient reactance ballast with electronic start circuit for the operation of fluorescent lamps of various wattages at standard levels of light output as well as at increased levels of light output | Michael S. Knippert | 1986-11-11 |
| 4567421 | Battery disconnect sensing circuit for battery charging systems | — | 1986-01-28 |
| 4384874 | Dust control apparatus with cleaning control circuit | — | 1983-05-24 |
| 4223368 | Electrostatic discharge protection device | — | 1980-09-16 |