Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4945909 | Pacemaker with activity-dependent rate limiting | Neal E. Fearnot, William L. Johnson, Donald Stevens | 1990-08-07 |
| 4905697 | Temperature-controlled cardiac pacemaker responsive to body motion | William L. Johnson, Donald Stevens | 1990-03-06 |