Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4498532 | Pump down tool and check valve | — | 1985-02-12 |
| 4247312 | Drilling fluid circulation system | Pramod C. Thakur, Stephen D. Lauer, Emrys Jones | 1981-01-27 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4498532 | Pump down tool and check valve | — | 1985-02-12 |
| 4247312 | Drilling fluid circulation system | Pramod C. Thakur, Stephen D. Lauer, Emrys Jones | 1981-01-27 |