Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5935519 | Apparatus for the detection of sulfur | Donald H. Stedman | 1999-08-10 |
| 5661036 | Process for the detection of sulfur | Donald H. Stedman | 1997-08-26 |
| 5424217 | Process for the detection of sulfur | Donald H. Stedman | 1995-06-13 |