Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4856591 | Method and apparatus for completing a non-vertical portion of a subterranean well bore | Edward C. Spatz, John V. Salerni, Elmer R. Peterson, John B. Weirich | 1989-08-15 |