Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882830 | Method for improving the integrity of coupling sections in high performance tubing and casing | — | 1989-11-28 |
| 4878285 | Method of assembling coupling to tubing or casting | — | 1989-11-07 |
| 4875713 | Internally coated tubular system | — | 1989-10-24 |
| 4872253 | Apparatus and method for improving the integrity of coupling sections in high performance tubing and casing | — | 1989-10-10 |