Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6215391 | Variable frequency buzzer assembly | Matthew Murray | 2001-04-10 |
| 5825375 | Ink jet system with serial data printheads | Jimmy L. Droit, Mark Reinders, Mark K. Virkus | 1998-10-20 |
| 5606349 | Ink jet system with serial data printheads | Jimmy L. Droit, Mark Reinders, Mark K. Virkus | 1997-02-25 |
| 5600718 | Apparatus and method for adaptively precompensating for loudspeaker distortions | Paul W. Dent, Jim Rasmusson | 1997-02-04 |
| 5115493 | Continuous laser printer for printing over page boundaries | Ivan M. Jeanblanc, Stephen E. Hutchison, Mark K. Virkus | 1992-05-19 |