Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4969517 | Sub-mudling casing hanger/packoff | William A. Valka | 1990-11-13 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4969517 | Sub-mudling casing hanger/packoff | William A. Valka | 1990-11-13 |