Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D917418 | Loudspeaker enclosure | Aaron L. Surratt, Daniel S. Barkil | 2021-04-27 |
| 8023688 | Ultra low frequency transducer and loud speaker comprising same | William O. Doerring | 2011-09-20 |
| 7916890 | Ultra low frequency transducer and loud speaker comprising same | William O. Doering | 2011-03-29 |
| 6611604 | Ultra low frequency transducer and loud speaker comprising same | William O. Doering | 2003-08-26 |
| D473216 | Subwoofer surround and diaphragm assembly | William O. Doering | 2003-04-15 |
| D456386 | Subwoofer basket | William O. Doering | 2002-04-30 |
| D449293 | Speaker grill | William O. Doering | 2001-10-16 |
| D355193 | Sub-woofer enclosure | — | 1995-02-07 |
| D307015 | Speaker | — | 1990-04-03 |
| D305333 | Speaker | — | 1990-01-02 |