Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8047294 | Dual flapper safety valve | Michael B. Vinzant, James M. Williams | 2011-11-01 |
| 8038120 | Magnetically coupled safety valve with satellite outer magnets | Jimmie R. Williamson, Jr. | 2011-10-18 |