Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4838068 | Method of fabricating threaded connection for pipes | Frank J. Carlin | 1989-06-13 |
| 4796928 | Threaded connection for pipes and method of fabricating same | Frank J. Carlin | 1989-01-10 |