Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8402951 | Reverse operating nonlinear spring | — | 2013-03-26 |
| 5624155 | Electromagnetic transducer | Dennis Bulgatz, Drew Kallen | 1997-04-29 |
| 5424592 | Electromagnetic transducer | Dennis Bulgatz, Drew Kallen | 1995-06-13 |