Issued Patents 1997
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5697461 | Rotary drill bit having a non-rotating gauge section | Alex Newton, Andrew Murdock, Daniel J. Sarik | 1997-12-16 |
| 5669271 | Elements faced with superhard material | Nigel Dennis Griffin | 1997-09-23 |
| 5651421 | Rotary drill bits | Alex Newton, Malcolm R. Taylor, Andrew Murdock | 1997-07-29 |
| 5649604 | Rotary drill bits | Andrew Murdock | 1997-07-22 |
| 5617928 | Elements faced with superhard material | Terry R. Matthias, Nigel Dennis Griffin | 1997-04-08 |
| 5590728 | Elements faced with superhard material | Terry R. Matthias, Nigel Dennis Griffin | 1997-01-07 |