Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4838477 | Method of welding flanged pipe sections and apparatus therefor | Max Jerry Roach | 1989-06-13 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4838477 | Method of welding flanged pipe sections and apparatus therefor | Max Jerry Roach | 1989-06-13 |