Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5113663 | Multi-stage cryogenic refrigerator | — | 1992-05-19 |
| 4848092 | Heat exchanger for cryogenic refrigerator | — | 1989-07-18 |
| 4490983 | Regenerator apparatus for use in a cryogenic refrigerator | Stephen Dail Swift | 1985-01-01 |