Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4610161 | Method and apparatus for determining fluid circulation conditions in well drilling operations | George F. Gehrig | 1986-09-09 |
| 4553429 | Method and apparatus for monitoring fluid flow between a borehole and the surrounding formations in the course of drilling operations | John L. Evans, George F. Gehrig | 1985-11-19 |
| 4375310 | Self-locking cable connector | Leon Robinson, Adelber Barry | 1983-03-01 |
| 4282939 | Method and apparatus for compensating well control instrumentation for the effects of vessel heave | L. Donald Maus, James D. Howell | 1981-08-11 |
| 4271908 | Tracked cable guide assembly and method for storing conductor cable inside a drill pipe | Leon Robinson, Adelbert Barry | 1981-06-09 |