Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7673705 | Compartmentalized MWD tool with isolated pressure compensator | Daniel E. MILLIGAN, Howard Smith, Dennis Naylor, Michael Redmond | 2010-03-09 |
| 5873420 | Air and mud control system for underbalanced drilling | — | 1999-02-23 |
| 5831549 | Telemetry system involving gigahertz transmission in a gas filled tubular waveguide | — | 1998-11-03 |
| 5289889 | Roller cone core bit with spiral stabilizers | Johnny Castle, Paul G. Parys | 1994-03-01 |