Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6196051 | Apparatus for determining odor levels in gas streams | Stephen E. Marshall, Glenn Scott Selman | 2001-03-06 |
| 5996396 | Apparatus for determining odor levels in gas streams | Stephen E. Marshall, Glenn Scott Selman | 1999-12-07 |