Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10689946 | Downhole cement flow | Malcolm Perschke, James Hall | 2020-06-23 |
| 10519743 | Downhole cement flow | Malcolm Perschke, James Hall | 2019-12-31 |
| 10227843 | Downhole cement flow | Malcolm Perschke, James Hall | 2019-03-12 |
| 6009943 | Liner assembly and method | John M. Yokley, James A. Simson, Mark J. Murray | 2000-01-04 |
| 5887660 | Liner packer assembly and method | John M. Yokley, Mark J. Murray, Ronald J. Selby | 1999-03-30 |
| 5884702 | Liner assembly and method | John M. Yokley, James A. Simson, Mark J. Murray | 1999-03-23 |