Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5697461 | Rotary drill bit having a non-rotating gauge section | John M. Fuller, Andrew Murdock, Daniel J. Sarik | 1997-12-16 |
| 5671818 | Rotary drill bits | Malcolm R. Taylor, Andrew Murdock, John Martin Clegg | 1997-09-30 |
| 5651421 | Rotary drill bits | Malcolm R. Taylor, John M. Fuller, Andrew Murdock | 1997-07-29 |
| 5605199 | Elements faced with super hard material | — | 1997-02-25 |