Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4796668 | Device for protecting threadings and butt-type joint bearing surfaces of metallic tubes | — | 1989-01-10 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4796668 | Device for protecting threadings and butt-type joint bearing surfaces of metallic tubes | — | 1989-01-10 |