Patents per Year
Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8542865 | Transducer motor structure and inside-only voice coil for use in loudspeakers | — | 2013-09-24 |
| 8477979 | Compression driver and horn structure | — | 2013-07-02 |
| 7557471 | Acoustic wave generating apparatus and method | Jeffery T. Springer, James L. Kirschman, Conrad P. Sandoval, Joseph B. Young | 2009-07-07 |
| 7402922 | Acoustic wave generating apparatus and method | Jeffery T. Springer, James L. Kirschman, Conrad P. Sandoval, Joseph B. Young | 2008-07-22 |
| 7360499 | Helmholtz resonator type marine signal | — | 2008-04-22 |
| D556077 | Marine fog horn | — | 2007-11-27 |
| 4805730 | Loudspeaker enclosure | Jason Dunaway | 1989-02-21 |
| 4647487 | Pressing cloth | — | 1987-03-03 |
| 4580015 | Loud speaker with minimized magnetic leakage | — | 1986-04-01 |
| 4452333 | Speaker system | Hartley D. Peavey | 1984-06-05 |
| 4421956 | Loud speaker with minimized magnetic leakage | — | 1983-12-20 |