Issued Patents 2017
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9677370 | Deformable plug and seal well system | William Mark Richards, Andy C. Chang, Timothy Edward Harms | 2017-06-13 |
| 9677372 | Well system cementing plug | William Mark Richards, Andy C. Chang | 2017-06-13 |