Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9157310 | Tripping indicator for MWD systems | Robert A. Estes | 2015-10-13 |
| 7813878 | Gyroscopic steering tool using only a two-axis rate gyroscope and deriving the missing third axis | Robert A. Estes, Randell Riggs, David M. Epplin | 2010-10-12 |
| 7234540 | Gyroscopic steering tool using only a two-axis rate gyroscope and deriving the missing third axis | Robert A. Estes, Randell Riggs, David M. Epplin | 2007-06-26 |