Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4491698 | Electro-acoustic transducer with diaphragm and blank therefor | David A. Larson | 1985-01-01 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4491698 | Electro-acoustic transducer with diaphragm and blank therefor | David A. Larson | 1985-01-01 |