Issued Patents 2017
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9671308 | Method for helium mass spectrometric fine-leak test based on quantitative determination of maximum test-waiting time | Fei Li, Caiyi Wang, Ningbo Li, Liyan Wang, Lijun Dong +1 more | 2017-06-06 |
| 9651444 | Method of cumulative helium mass spectrometric combination test by using argon as gross-leak tracer gas | Ningbo Li, Fei Li | 2017-05-16 |