Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6725859 | Apparatus for delivering air-borne substances | Hsu-Chi Yeh, Bernard Greenspan | 2004-04-27 |
| 6073818 | Apparatus for controlled delivery of powdered solid materials | Richard Joel Hershman, Brian Wong | 2000-06-13 |
| 5896829 | Head-only animal exposure chambers | George Dearlove, John L. Barnett, Daniel Dewees, William Ehrhart | 1999-04-27 |