Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5215885 | Stable two-part chromogen substrate | David J. Marrujo, Patrick F. Coleman, Charles Walbourn | 1993-06-01 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5215885 | Stable two-part chromogen substrate | David J. Marrujo, Patrick F. Coleman, Charles Walbourn | 1993-06-01 |