Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8656942 | Length-adjustable pressure-retaining piping components | Pablo Garce, Sandra Lipezker, Yue Gong | 2014-02-25 |
| 7823643 | Insulation shroud with internal support structure | Michael Mann | 2010-11-02 |
| 6557629 | Wellhead isolation tool | Roy W. Benefield, George E. Guthrie, Christopher P. Egan | 2003-05-06 |
| 6374914 | Duel completion bop centralizer | Gregory L. Glidden, Richard T. Schmidt | 2002-04-23 |
| 5896925 | Tool protection guide | Gerald Brian Swagerty, David Cain, John Robert Herold, Don B. Wafer, Randy Elum +1 more | 1999-04-27 |
| 5782297 | Retrieval tool for back pressure valve and tree test plug | Martin L. Samuels, Bashir M. Koleilat, David Cain, John Robert Herold, Neil Crawford | 1998-07-21 |
| 5775422 | Tree test plug | David Cain, Jeffrey L. Mathews | 1998-07-07 |
| 5730218 | Tool protection guide with energy absorbing bumper | Gerald Brian Swagerty, David Cain, John Robert Herold, Don B. Wafer, Randy Elum +1 more | 1998-03-24 |
| 5342066 | Non-extrusion device for split annular casing/tubing hanger compression seals | Ronald W. Henley, Ronald D. Quates, Michael R. Williams | 1994-08-30 |
| 5183268 | Metal-to-metal wellhead seal for rough casing | Ronald D. Quates, Lien-Yan Chen | 1993-02-02 |
| 5088390 | Automatic food cooking device | Peng Zhou | 1992-02-18 |
| 4914854 | Insect trap | Peng Zhou | 1990-04-10 |
| 4821631 | Cooking food device | Pen Weichou | 1989-04-18 |
| 4193234 | Stabilizing of structures | — | 1980-03-18 |