Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6751557 | Rock classification method and apparatus | Anish Kumar, George Richard Kear, Oswaldo E. Viloria, David R. Williamson | 2004-06-15 |
| 6675895 | Well cementing | John F. Vaeth, Lucian Johnston | 2004-01-13 |