Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4842069 | Apparatus and method for cementing a liner in a well bore | David L. Nevels | 1989-06-27 |
| 4805698 | Packer cooling system for a downhole steam generator assembly | Frank Mooney, Joseph E. Vandevier | 1989-02-21 |