Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6628792 | Back to back mounted compound woofer with compression/bandpass loading | — | 2003-09-30 |
| 6061461 | Audio transducer | — | 2000-05-09 |
| 5727076 | Audio transducer having piezoelectric device | — | 1998-03-10 |
| 5652801 | Resonance damper for piezoelectric transducer | — | 1997-07-29 |
| 5604815 | Single magnet audio transducer and method of manufacturing | — | 1997-02-18 |
| 5570429 | Audio transducer with flexible foam enclosure | — | 1996-10-29 |
| 5450497 | Audio transducer improvements | — | 1995-09-12 |
| 5446797 | Audio transducer with etched voice coil | — | 1995-08-29 |
| 5249237 | Audio transducer improvements | — | 1993-09-28 |
| 5230021 | Audio transducer improvements | — | 1993-07-20 |
| 5198624 | Audio transducer with controlled flexibility diaphragm | Steven Geist | 1993-03-30 |
| 5127060 | Centering device for speaker diaphragm | — | 1992-06-30 |
| 4903308 | Audio transducer with controlled flexibility diaphragm | Steven Geist | 1990-02-20 |
| 4584439 | Audio transducer with controlled flexibility diaphragm | — | 1986-04-22 |