Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5673687 | Humidifier for a ventilator and an associated attachment | Darwin B. Dobson, Douglas R. Ogden, Eugene Pennington Smith | 1997-10-07 |
| 5662101 | Respiratory facial mask | Douglas R. Ogden, Joseph A. Abeyta | 1997-09-02 |