Issued Patents 2018
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9982464 | Security device with multiple control states | David P. Christianson, Donald Matthew Johnson | 2018-05-29 |
| 9959723 | Product presence sensor security device | David P. Christianson | 2018-05-01 |