Issued Patents 1982
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4354529 | Pipe thread protector | Robert F. Callanan | 1982-10-19 |
| 4324157 | Drill pipe clamp | — | 1982-04-13 |
| 4318426 | Pipe thread protector | Robert F. Callanan | 1982-03-09 |
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4354529 | Pipe thread protector | Robert F. Callanan | 1982-10-19 |
| 4324157 | Drill pipe clamp | — | 1982-04-13 |
| 4318426 | Pipe thread protector | Robert F. Callanan | 1982-03-09 |