Issued Patents 2016
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9388663 | Downhole circulating valve having a metal-to-metal seal and method for operating same | Jimmie R. Williamson, Jr., Leo G. Collins, Russell Irving Bayh, III | 2016-07-12 |