Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4271704 | Fluid sampling device and method of sampling fluid | — | 1981-06-09 |
| 4250974 | Apparatus and method for detecting abnormal drilling conditions | Joe K. Heilhecker, Leon Robinson | 1981-02-17 |