Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6678213 | Slotted cylinder transducer with trapezoidal cross-sectional electrodes | Willard Rask | 2004-01-13 |
| 5894451 | Impulsive snap-through acoustic pulse generator | Willard Rask | 1999-04-13 |