Issued Patents 2002
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6374930 | Cutting structure for roller cone drill bits | Sujian Huang | 2002-04-23 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6374930 | Cutting structure for roller cone drill bits | Sujian Huang | 2002-04-23 |