Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5983735 | Method and apparatus for analyzing particulate matter | Wieland E. von Behrens, George D. Chappell, James G. Young | 1999-11-16 |
| 5895869 | Method and apparatus for analyzing particulate matter | Wieland E. von Behrens, George D. Chappell, James G. Young | 1999-04-20 |