Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11179834 | Elastic sealing ring expanding apparatus | Lei Zhou, Dandan Zhang, Lvhai Hu, Roberto Francisco-Yi Lu | 2021-11-23 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11179834 | Elastic sealing ring expanding apparatus | Lei Zhou, Dandan Zhang, Lvhai Hu, Roberto Francisco-Yi Lu | 2021-11-23 |