Issued Patents 2018
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10053921 | Contact pressure limitation | Jian Zhao, Upul Shanthilal Fernando | 2018-08-21 |
| 9976413 | Pressure locking device for downhole tools | David S. Cramer, Carl Allison Perry | 2018-05-22 |