Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887672 | Subsea wellhead with annulus communicating system | — | 1989-12-19 |
| 4826216 | Well housing and landing shoulder | James H. Owens, III, William M. Taylor | 1989-05-02 |
| 4807705 | Casing hanger with landing shoulder seal insert | Herman O. Henderson, Jr. | 1989-02-28 |