Issued Patents 1994
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5375659 | Sonde supported operating system for control of formation production fluid flow | Gregory N. Gilbert, Martin L. Tomek, William B. King, Jerry R. Bennett, William R. Welch | 1994-12-27 |
| 5361843 | Dedicated perforatable nipple with integral isolation sleeve | Christopher A. Dines | 1994-11-08 |
| 5355953 | Electromechanical shifter apparatus for subsurface well flow control | William R. Welch | 1994-10-18 |
| 5309988 | Electromechanical shifter apparatus for subsurface well flow control | William R. Welch | 1994-05-10 |