Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11421479 | Power swivel and lubrication system | Christopher Brian Walker, Henry Do, Mihail Puscas, Calvin Blankenship | 2022-08-23 |
| 11136826 | Guidance systems and apparatus for power swivel | Christopher Brian Walker, Henry Do, Mihail Puscas, Calvin Blankenship, Delfino Moreno, III +1 more | 2021-10-05 |
| 10947796 | Power swivel and gooseneck | Christopher Brian Walker, Henry Do, Mihail Puscas, Calvin Blankenship | 2021-03-16 |
| 10563770 | Washpipe assemblies for a power swivel | Christopher Brian Walker, Henry Do, Mihail Puscas, Calvin Blankenship | 2020-02-18 |