Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5047191 | Method for manufacturing loudspeaker diaphragm | Robert Brennan | 1991-09-10 |
| 4646874 | Loudspeaker diaphragm | Robert Brennan | 1987-03-03 |
| 4319098 | Loudspeaker having a unitary mechanical-acoustic diaphragm termination | — | 1982-03-09 |