Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8076809 | Additives for improving motor oil properties | Kevin S. Tingler, Suresha R. O'Bryan, Jianzhong Yang, Tauseef Salma | 2011-12-13 |
| 7861777 | Viscometer for downhole pumping | John L. Bearden | 2011-01-04 |