Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6005951 | Electronic stethoscope | James A. Grasfield, David E. Winston, Peter R. H. Stark, Daniela Steinhubel | 1999-12-21 |
| 6002777 | Electronic stethoscope | James A. Grasfield, David E. Winston, Peter R. H. Stark, Daniela Steinhubel | 1999-12-14 |
| 5825895 | Electronic stethoscope | James A. Grasfield, David E. Winston, Peter R. H. Stark, Daniela Steinhubel | 1998-10-20 |