Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8047280 | Drillable bridge plug | Lap Tran, William M. Roberts, Piro Shkurti | 2011-11-01 |
| 7980300 | Drillable bridge plug | William M. Roberts, James A. Simson | 2011-07-19 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8047280 | Drillable bridge plug | Lap Tran, William M. Roberts, Piro Shkurti | 2011-11-01 |
| 7980300 | Drillable bridge plug | William M. Roberts, James A. Simson | 2011-07-19 |