Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4455941 | Detonating cord and continuity verification system | Richard E. Walker, James D. Heckelman | 1984-06-26 |
| 4403143 | Detonating cord and continuity verification system | Richard E. Walker, James D. Heckelman | 1983-09-06 |
| 4318005 | Digital anti-theft locking circuit | James D. Heckelman | 1982-03-02 |
| 4188621 | Alarm system | James D. Heckelman | 1980-02-12 |