Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4866943 | Cyrogenic regenerator | John R. Purcell | 1989-09-19 |
| 4841268 | MRI Magnet system with permanently installed power leads | Sibley C. Burnett, John R. Purcell, Bruce C. Breneman | 1989-06-20 |