Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10398406 | One piece stethoscope diaphragm | Joseph P. Keller, Dean E. Sitz | 2019-09-03 |
| 10213181 | Stethoscope diaphragm | Joseph P. Keller, Dean E. Sitz | 2019-02-26 |
| D820981 | Stethoscope chestpiece | — | 2018-06-19 |
| D740415 | Stethoscope chestpiece | Thomas G. Skulley | 2015-10-06 |