Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4969362 | Dual element transducer | Ellis M. Zacharias, Jr., Henry E. Ryer | 1990-11-13 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4969362 | Dual element transducer | Ellis M. Zacharias, Jr., Henry E. Ryer | 1990-11-13 |