Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6215884 | Piezo speaker for improved passenger cabin audio system | Michael J. Parrella, Graham P. Eatwell | 2001-04-10 |
| 6181797 | Piezo speaker for improved passenger cabin audio systems | Michael J. Parrella, Graham P. Eatwell | 2001-01-30 |
| 5901231 | Piezo speaker for improved passenger cabin audio systems | Michael J. Parrella, Graham P. Eatwell | 1999-05-04 |
| 5638456 | Piezo speaker and installation method for laptop personal computer and other multimedia applications | John K. Conley, William Kokonaski, Michael J. Parrella | 1997-06-10 |