Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4718268 | Method and apparatus for detecting a contraband substance | William R. Davidson | 1988-01-12 |
| 4580440 | Method of detecting a contraband substance | William R. Davidson | 1986-04-08 |