Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11149992 | Dual helium compressors | Stephen Dunn, Ralph C. Longsworth | 2021-10-19 |
| 7654096 | Reduced torque valve for cryogenic refrigerator | Mingyao Xu, Jin Lin Gao, Motokazu Saito | 2010-02-02 |
| 7631505 | Wearless valve for cryorefrigerator | Jin Lin Gao, Ralph C. Longsworth, Mingyao Xu | 2009-12-15 |