Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4697638 | Downhole logging and servicing system with manipulatable logging and servicing tools | — | 1987-10-06 |
| 4506729 | Drill string sub with self closing cable port valve | Albert P. Davis, Jr., John W. Stoltz | 1985-03-26 |