Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4821330 | Wide-band loudspeaker having a diaphragm area divided into sub-areas for various frequency ranges | — | 1989-04-11 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4821330 | Wide-band loudspeaker having a diaphragm area divided into sub-areas for various frequency ranges | — | 1989-04-11 |