Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4604922 | Drill pipe turning device | — | 1986-08-12 |
| 4396038 | Pipe thread protectors and method for forming same | — | 1983-08-02 |
| 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 |
| 4291073 | Method for forming lubricating films | — | 1981-09-22 |