Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5183122 | Derrick assembly capable of conveying pipe sections between a drill string and a rack for said pipe sections | Gregory T. Cassady | 1993-02-02 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5183122 | Derrick assembly capable of conveying pipe sections between a drill string and a rack for said pipe sections | Gregory T. Cassady | 1993-02-02 |