Issued Patents 2003
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6629476 | Bi-center bit adapted to drill casing shoe | Rogerio H. Silva | 2003-10-07 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6629476 | Bi-center bit adapted to drill casing shoe | Rogerio H. Silva | 2003-10-07 |