Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4341264 | Wellhead shearing apparatus | Irwin Rosenhauch | 1982-07-27 |
| 4215747 | Blowout preventer with tubing aligning apparatus | William M. Taylor, Friedrich E. Just | 1980-08-05 |