Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6386291 | Subsea wellhead system and method for drilling shallow water flow formations | William A. Valka | 2002-05-14 |
| 5088556 | Subsea well guide base running tool | William A. Valka | 1992-02-18 |
| 5069287 | Retrievable guide base for subsea well | Arthur G. Ahlstone, William A. Valka | 1991-12-03 |