Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4394882 | Continuous chain bit with downhole cycling capability | Don Ritter, Jack A. St. Clair | 1983-07-26 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4394882 | Continuous chain bit with downhole cycling capability | Don Ritter, Jack A. St. Clair | 1983-07-26 |