Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5315116 | Baffled cold shields for infrared detector | Donald G. DuPree, Robert J. Housman | 1994-05-24 |
| 5277782 | Baffled cold shields for infrared detector | Donald G. DuPree, Robert J. Housman | 1994-01-11 |
| 4446763 | Mortice cylinder lock wrench structures | LeVone A. Blough | 1984-05-08 |
| 4447176 | Template for mortice cylinder lock removal | LeVone A. Blough | 1984-05-08 |
| 4379576 | Sliding closure security system | LeVone A. Blough | 1983-04-12 |
| 4309140 | Self-locking threaded fastener and unlocking tool combination | Robert G. Steffen, LeVone A. Blough | 1982-01-05 |
| 4307983 | Apparatus for gaining access to enclosures secured by cylinder locks with minimum damage to internal lock elements | LeVone A. Blough | 1981-12-29 |
| 4261093 | Tool and method for gaining legitimate entry into a locked enclosure | Robert G. Steffen | 1981-04-14 |