Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4890269 | Heliochron | Mae Morris | 1989-12-26 |
| 4852654 | Wireline hydraulic isolation packer system | Norman W. Read, Donald E. Ritchie | 1989-08-01 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4890269 | Heliochron | Mae Morris | 1989-12-26 |
| 4852654 | Wireline hydraulic isolation packer system | Norman W. Read, Donald E. Ritchie | 1989-08-01 |