Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6522755 | Vehicular loudspeaker system | Mark E. Warnaka, Michael J. Parrella | 2003-02-18 |
| 6435303 | Sound absorbing structure | — | 2002-08-20 |
| 6356641 | Vehicular loudspeaker system | Mark E. Warnaka, Michael J. Parrella | 2002-03-12 |
| 6218766 | Loudspeaker assembly | Mark E. Warnaka | 2001-04-17 |
| 6195440 | Piezoelectric transducers | Mark E. Warnaka | 2001-02-27 |
| 5838805 | Piezoelectric transducers | Mark E. Warnaka | 1998-11-17 |
| 5835608 | Signal separating system | Francis J. Driscoll | 1998-11-10 |
| 5511127 | Active noise control | — | 1996-04-23 |
| 5046103 | Noise reducing system for voice microphones | Lynn A. Poole | 1991-09-03 |
| 4991433 | Phase track system for monitoring fluid material within a container | Mark E. Warnaka | 1991-02-12 |
| 4562589 | Active attenuation of noise in a closed structure | John M. Zalas | 1985-12-31 |
| 4477505 | Structure for absorbing acoustic and other wave energy | — | 1984-10-16 |
| 4473906 | Active acoustic attenuator | Lynn A. Poole, Jiří Tichý | 1984-09-25 |
| 4339018 | Sound absorbing structure | — | 1982-07-13 |
| 4243117 | Sound absorbing structure | — | 1981-01-06 |