Issued Patents All Time
Showing 126–150 of 154 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5765642 | Subterranean formation fracturing methods | — | 1998-06-16 |
| 5533571 | Surface switchable down-jet/side-jet apparatus | Kenneth D. Brune, Ken B. Kabinoff | 1996-07-09 |
| 5499678 | Coplanar angular jetting head for well perforating | Timothy W. Helton, Hazim H. Abass | 1996-03-19 |
| 5494103 | Well jetting apparatus | Steven L. Holden, David D. Szarka | 1996-02-27 |
| 5484016 | Slow rotating mole apparatus | Timothy W. Helton | 1996-01-16 |
| 5396957 | Well completions with expandable casing portions | Timothy W. Helton, Danny G. Porter | 1995-03-14 |
| 5396805 | Force sensor and sensing method using crystal rods and light signals | — | 1995-03-14 |
| 5366015 | Method of cutting high strength materials with water soluble abrasives | Gary W. Bradley, Brett L. Tisch | 1994-11-22 |
| 5361856 | Well jetting apparatus and met of modifying a well therewith | Steven L. Holden, David D. Szarka | 1994-11-08 |
| 5325923 | Well completions with expandable casing portions | Richard L. Giroux, Timothy W. Helton | 1994-07-05 |
| 5315864 | Start/stop method to determine static gel strength | Bary J. Nusz, Gordon A. Turner | 1994-05-31 |
| 5265247 | Laboratory data storage and retrieval system and method | Lynn K. Wienck, Gordon A. Turner, Allen F. Strange, John F. Burkhalter, Stephen R. Henry +1 more | 1993-11-23 |
| 5233863 | Fluid loss measuring system and method | Mark L. Suttle, Keith Edward Blaschke, Stewart E. Rowell | 1993-08-10 |
| 5226445 | Valve having convex sealing surface and concave seating surface | — | 1993-07-13 |
| 5192509 | Apparatus for automatic titration | Clyde Lee | 1993-03-09 |
| 5125582 | Surge enhanced cavitating jet | John Howlett, Jr. | 1992-06-30 |
| 5056600 | Control apparatus and method responsive to a changing stimulus | Bill White | 1991-10-15 |
| 4990076 | Pressure control apparatus and method | Michael Lynch, G. Allen Turner, Mark C. Ehlert | 1991-02-05 |
| 4917349 | Valve, and set point pressure controller utilizing the same | Mark C. Ehlert | 1990-04-17 |
| 4905281 | Security apparatus and method for computers connected to telephone circuits | Jack C. Penn | 1990-02-27 |
| 4853883 | Apparatus and method for use in simulating operation and control of a railway train | Stephen K. Nickles, John E. Haley, Lynn K. Wienck | 1989-08-01 |
| 4622846 | Consistency and static gel strength measuring device and method | John Jeffery Moon, Jr., Mark C. Ehlert | 1986-11-18 |
| 4575313 | Digital pressure controller | Prabhakar P. Rao, Jack C. Penn | 1986-03-11 |
| 4551766 | Optical reader | John E. Mosier, Jack C. Penn | 1985-11-05 |
| 4531189 | Data conversion, communication and analysis system | John E. Mosier, George B. McLawhon, Jack C. Penn | 1985-07-23 |