Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7514878 | High frequency electronic ballast with sine wave oscillator | Earl F. Crandall | 2009-04-07 |
| 7514879 | Method and system for driving a plasma-based light source | Earl F. Crandall, Ray King | 2009-04-07 |
| 7388334 | High frequency electronic ballast with sine wave oscillator | Earl F. Crandall, Robert G. Crandall | 2008-06-17 |
| 6404569 | Light switch cover plate with audio recording and playback feature | David E. Bachschmid | 2002-06-11 |
| 6326731 | Socket and ballast for gas discharge lamp | Herbert L. Robinson, David E. Bachschmid | 2001-12-04 |
| 5914826 | Light switch cover plate with audio recording and playback feature | — | 1999-06-22 |
| 5654609 | Gas discharge lamp and power distribution system therefor | Michael P. Zarich | 1997-08-05 |
| 5485057 | Gas discharge lamp and power distribution system therefor | Michael P. Zarich | 1996-01-16 |