Issued Patents 2003
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6601662 | Polycrystalline diamond cutters with working surfaces having varied wear resistance while maintaining impact strength | Terry R. Matthias, Nigel Dennis Griffin | 2003-08-05 |
| 6592985 | Polycrystalline diamond partially depleted of catalyzing material | Nigel Dennis Griffin | 2003-07-15 |
| 6589640 | Polycrystalline diamond partially depleted of catalyzing material | Nigel Dennis Griffin | 2003-07-08 |
| 6585064 | Polycrystalline diamond partially depleted of catalyzing material | Nigel Dennis Griffin | 2003-07-01 |
| 6562462 | High volume density polycrystalline diamond with working surfaces depleted of catalyzing material | Nigel Dennis Griffin | 2003-05-13 |
| 6544308 | High volume density polycrystalline diamond with working surfaces depleted of catalyzing material | Nigel Dennis Griffin | 2003-04-08 |