Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7888126 | Filter for determination of mercury in exhaust gases | Tom Baldwin, John C. Ward | 2011-02-15 |
| 7368289 | Filter for determination of mercury in exhaust gases | Tom Baldwin, John C. Ward | 2008-05-06 |
| 5423228 | Dilution stack sampling apparatus | William C. Knapp | 1995-06-13 |
| 5053623 | Photometric analyzer for differential total reduced sulfur measurement by comparison with sample gas | Gerald F. McGowan, Ronald L. Ketchum | 1991-10-01 |