Issued Patents 2002
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6481511 | Rotary drill bit | Terry R. Matthias, Peter Raymond Hughes | 2002-11-19 |
| 6439327 | Cutting elements for rotary drill bits | Terry R. Matthias | 2002-08-27 |
| 6435058 | Rotary drill bit design method | Terry R. Matthias, Peter Raymond Hughes | 2002-08-20 |
| 6410085 | Method of machining of polycrystalline diamond | Peter Raymond Hughes | 2002-06-25 |