Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE45641 | Mud flow back valve | Knut Henriksen | 2015-08-04 |
| 6976542 | Mud flow back valve | Knut Henriksen | 2005-12-20 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE45641 | Mud flow back valve | Knut Henriksen | 2015-08-04 |
| 6976542 | Mud flow back valve | Knut Henriksen | 2005-12-20 |