Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4972198 | Multiple loop antenna | John F. Feltz, Michael F. Hartings | 1990-11-20 |
| 4872018 | Multiple loop antenna | John F. Feltz, Michael F. Hartings | 1989-10-03 |
| 4649397 | Theft deterrent tag | Steven C. Linton | 1987-03-10 |