Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5562101 | Portable spirometer with improved accuracy | John L. Hankinson, Joseph O. Viola | 1996-10-08 |
| 5277196 | Portable spirometer with improved accuracy | John L. Hankinson, Joseph O. Viola | 1994-01-11 |