Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5608797 | On-line indicator for multipurpose headset amplifier | Leo Larsen, Charles L. Pedersen | 1997-03-04 |
| 5426345 | High voltage electronic tube with intermediate electrode | — | 1995-06-20 |
| 5402464 | High-voltage electronic tube | Christian Schenk | 1995-03-28 |
| 5303308 | Audio frequency signal compressing system | Leo Larsen | 1994-04-12 |
| 4789997 | Circuit arrangement for producing high voltages | Peer K. Hansen | 1988-12-06 |
| 4563769 | X-Ray generator device | — | 1986-01-07 |