Issued Patents 2021
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11149525 | System, method and apparatus for controlling fluid flow through drill string | David S. Cramer | 2021-10-19 |
| 11041351 | Downhole flow diversion device with oscillation damper | David S. Cramer, David Devlin | 2021-06-22 |