Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5357481 | Borehole logging tool | Robert A. Lester, Paul G. Junghans, Donald J. Hilliker, Mathew G. Schmidt, Jose Casarsa | 1994-10-18 |
| 5229553 | Acoustic isolator for a borehole logging tool | Robert A. Lester | 1993-07-20 |
| 4438810 | Apparatus for decentralizing and orienting a well logging or perforating instrument | — | 1984-03-27 |
| 4410051 | System and apparatus for orienting a well casing perforating gun | Wilbur L. Daniel, Eugene J. Linyaev, Arnold Walkow | 1983-10-18 |