RD

Rex E. Duhn

DT Duhn Oil Tool: 10 patents #1 of 7Top 15%
SI Seaboard International: 5 patents #1 of 20Top 5%
SP Shell Western E & P: 1 patents #10 of 35Top 30%
UN Unknown: 1 patents #29,356 of 83,584Top 40%
📍 Bakersfield, CA: #27 of 840 inventorsTop 4%
🗺 California: #35,036 of 386,348 inventorsTop 10%
Overall (All Time): #268,042 of 4,157,543Top 7%
17
Patents All Time

Issued Patents All Time

Showing 1–17 of 17 patents

Patent #TitleCo-InventorsDate
11976542 Frac distribution tower Robert K. Meek 2024-05-07
8863829 Wellhead isolation tool and wellhead assembly incorporating the same Robert K. Meek 2014-10-21
8333237 Wellhead isolation tool and wellhead assembly incorporating the same Robert K. Meek 2012-12-18
RE43773 Drilling quick connectors 2012-10-30
RE43697 Drilling quick connectors 2012-10-02
8272433 Wellhead isolation tool and wellhead assembly incorporating the same Robert K. Meek 2012-09-25
7726393 Wellhead isolation tool and wellhead assembly incorporating the same Robert K. Meek 2010-06-01
7520322 Wellhead isolation tool and method of fracturing a well Robert K. Meek 2009-04-21
7493944 Wellhead isolation tool and method of fracturing a well Robert K. Meek 2009-02-24
7416020 Wellhead isolation tool, wellhead assembly incorporating the same, and method of fracturing a well Robert K. Meek 2008-08-26
7322407 Wellhead isolation tool and method of fracturing a well Robert K. Meek 2008-01-29
6920925 Wellhead isolation tool Robert K. Meek 2005-07-26
6543533 Well tubing rotator Robert K. Meek 2003-04-08
6199914 Drilling quick connectors 2001-03-13
5611398 Two-piece drilling flange William D. Chapman 1997-03-18
5303774 Ring seal packer Jay C. Duhn, Kenneth D. Webster, Aaron B. Speirs 1994-04-19
4974676 Ground subsiding wellhead Jay C. Duhn, William D. Chapman 1990-12-04