Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5255321 | Acoustic transducer for automotive noise cancellation | Richard Louis Weisman | 1993-10-19 |
| 4655316 | Acoustic diaphragm | — | 1987-04-07 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5255321 | Acoustic transducer for automotive noise cancellation | Richard Louis Weisman | 1993-10-19 |
| 4655316 | Acoustic diaphragm | — | 1987-04-07 |