Issued Patents 2003
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6513607 | Metal-face-seal rock bit | Howard J. Walk | 2003-02-04 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6513607 | Metal-face-seal rock bit | Howard J. Walk | 2003-02-04 |