Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5301082 | Current limiter circuit | Larry G. Stolarczyk, Kurt A. Smoker, William E. Mondt, Marvin L. Hasenack, Jr., James L. Zappanti +2 more | 1994-04-05 |
| 5093929 | Medium frequency mine communication system | Larry G. Stolarczyk, Kurt A. Smoker, William E. Mondt, Marvin L. Hasenack, Jr., James L. Zappanti +2 more | 1992-03-03 |
| 4879755 | Medium frequency mine communication system | Larry G. Stolarczyk, Kurt A. Smoker, William E. Mondt, Marvin L. Hasenack, Jr., James L. Zappanti +2 more | 1989-11-07 |