Issued Patents 2018
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10161211 | Running tool locking system and method | Chi-Wen Yao, Eric Calzoncinth, Heinrich Lang | 2018-12-25 |
| 9945200 | Cartridge valve assembly for wellhead | Brandon Cain, Eric Calzoncinth, Michael D. Mosher | 2018-04-17 |