Issued Patents 1982
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4360064 | Circulating valve for wells | John A. O'Connor, Warren E. Holland, James D. Burley, Ronald D. Rogers, Fred E. Watkins | 1982-11-23 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4360064 | Circulating valve for wells | John A. O'Connor, Warren E. Holland, James D. Burley, Ronald D. Rogers, Fred E. Watkins | 1982-11-23 |