Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 5646611 | System and method for indirectly determining inclination at the bit | Charles D. Barron | 1997-07-08 | $77,821,000 |
| 5160925 | Short hop communication link for downhole MWD system | Charles D. Barron, Louis H. Rorden | 1992-11-03 | $3,569,000 |
| 4515225 | Mud energized electrical generating method and means | — | 1985-05-07 | $1,993,000 |
| 4401134 | Pilot valve initiated mud pulse telemetry system | — | 1983-08-30 | $6,196,000 |
| 4346920 | Threaded connection using variable lead threads | — | 1982-08-31 | $1,640,000 |