Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4307729 | Optical digitizer for measuring spirometer output | Russell F. Hart, Gerald A. Brumm | 1981-12-29 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4307729 | Optical digitizer for measuring spirometer output | Russell F. Hart, Gerald A. Brumm | 1981-12-29 |