Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5490497 | Inhalation devices with a reduced risk of blockage | Kevan E. Chippendale, John S. Corbett, John L. Hart | 1996-02-13 |
| 5349944 | Inhalation devices with a reduced risk of blockage | Kevan E. Chippendale, John S. Corbett, John L. Hart | 1994-09-27 |