Issued Patents 2018
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10113383 | Positive retention lock ring for tubing hanger | Khanh Duong | 2018-10-30 |
| 9989157 | Valve vented redundant stem seal system | — | 2018-06-05 |
| 9982503 | Wellhead metal seal with energizing ring having trapped fluid reliefs | Joseph W. Pallini, David L. Ford, Robert Jen-Yue Du | 2018-05-29 |
| 9897215 | Multi-valve seat seal assembly for a gate valve | Jon B. Kahn, Fabio O. Tanaka | 2018-02-20 |