Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10094188 | Casing hanger and running tool system | — | 2018-10-09 |
| 8950485 | Drilling/frac adapter and method of use | Danny R. Wilkins, Thomas Henry Holtkamp | 2015-02-10 |
| 8528650 | Mandrel casing hanger and running tool system | Martin Anthony Trumbull | 2013-09-10 |
| 7350246 | Bathroom leak damage prevention apparatus | Jennifer Smith | 2008-04-01 |
| 6484382 | Method of providing an internal circumferential shoulder in a cylindrical passageway | — | 2002-11-26 |
| 6176310 | Assembly for sealing the annulus between concentric cylindrical surfaces | Floyd J. Lane | 2001-01-23 |
| 5424224 | Method of surface protection of a semiconductor wafer during polishing | Franklin L. Allen, Eugene C. Davis, Lawrence D. Dyer, Jerry B. Medders, Vikki S. Simpson +2 more | 1995-06-13 |
| 5325925 | Sealing method and apparatus for wellheads | Philip Huang | 1994-07-05 |
| 5229306 | Backside gettering method employing a monocrystalline germanium-silicon layer | Keith Lindberg, Greg Gopffarth | 1993-07-20 |
| 5000266 | Hydraulic/torsion packoff installation tool | Brian Saunders | 1991-03-19 |
| 4923006 | Insulating support for tubing string | Michael Hartmann | 1990-05-08 |
| 4869319 | Wellhead structure | Edward J. Szymozak, Thomas G. Cassity, William M. Taylor, Peer H. Tiemer, Larry M. Hoes +1 more | 1989-09-26 |
| 4828293 | Wellhead slip and seal assembly | Delbert Edwin Vanderford | 1989-05-09 |
| 4825945 | Wellhead valve | — | 1989-05-02 |
| 4766956 | Wellhead annular seal | Edward J. Szymczak | 1988-08-30 |
| 4590943 | System for providing power to portable defibrillator | Mike M. Paull, Kathleen D. Schoenberg | 1986-05-27 |
| 4515400 | Wellhead assembly | Edward J. Szymczak | 1985-05-07 |