P

Inventor

CAMPBELL JOHN E

US62 patents
⚠️ This page may combine multiple inventors who share the name “CAMPBELL JOHN E”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

SMITH INTERNATIONAL

19 patents
US5878818AMar 9, 1999

Mechanical set anchor with slips pocket

SMITH INTERNATIONAL103 citations97
US5829531ANov 3, 1998

Mechanical set anchor with slips pocket

SMITH INTERNATIONAL108 citations97
US5431220AJul 11, 1995

Whipstock starter mill assembly

SMITH INTERNATIONAL152 citations97
US7506703B2Mar 24, 2009

Drilling and hole enlargement device

SMITH INTERNATIONAL48 citations96
US6499537B1Dec 31, 2002

Well reference apparatus and method

SMITH INTERNATIONAL54 citations96
US5657820AAug 19, 1997

Two trip window cutting system

SMITH INTERNATIONAL85 citations96
US5427179AJun 27, 1995

Retrievable whipstock

SMITH INTERNATIONAL66 citations95
US5348107ASep 20, 1994

Pressure balanced inner chamber of a drilling head

SMITH INTERNATIONAL105 citations95
US6935431B2Aug 30, 2005

Well reference apparatus and method

SMITH INTERNATIONAL17 citations93
US6648069B2Nov 18, 2003

Well reference apparatus and method

SMITH INTERNATIONAL14 citations93
US6543536B2Apr 8, 2003

Well reference apparatus and method

SMITH INTERNATIONAL28 citations93
US7448446B2Nov 11, 2008

Thru tubing tool and method

SMITH INTERNATIONAL16 citations90
US7178589B2Feb 20, 2007

Thru tubing tool and method

SMITH INTERNATIONAL26 citations90
US7597158B2Oct 6, 2009

Drilling and hole enlargement device

SMITH INTERNATIONAL9 citations84
US6899183B2May 31, 2005

Casing attachment method and apparatus

SMITH INTERNATIONAL14 citations84
US7377328B2May 27, 2008

Expandable anchor

SMITH INTERNATIONAL18 citations83
US7373988B2May 20, 2008

Liner running system and method

SMITH INTERNATIONAL16 citations83
US6499538B2Dec 31, 2002

Method and apparatus for forming an optimized window

SMITH INTERNATIONAL10 citations74
US10487606B2Nov 26, 2019

Balancing load on milling cutting elements

SMITH INTERNATIONAL5 citations72

IBM

10 patents
US7141853B2Nov 28, 2006

Method and structure for buried circuits and devices

IBM385 citations99
US6759282B2Jul 6, 2004

Method and structure for buried circuits and devices

IBM338 citations99
US5530753AJun 25, 1996

Methods and apparatus for secure hardware configuration

IBM112 citations96
US5530749AJun 25, 1996

Methods and apparatus for secure hardware configuration

IBM106 citations96
US7491588B2Feb 17, 2009

Method and structure for buried circuits and devices

IBM17 citations92
US7418580B1Aug 26, 2008

Dynamic object-level code transaction for improved performance of a computer

IBM28 citations92
US7320918B2Jan 22, 2008

Method and structure for buried circuits and devices

IBM14 citations92
US5365587ANov 15, 1994

Self modifying access code for altering capabilities

IBM104 citations91
US5553144ASep 3, 1996

Method and system for selectively altering data processing system functional characteristics without mechanical manipulation

IBM34 citations87
US7617367B2Nov 10, 2009

Memory system including a two-on-one link memory subsystem interconnection

IBM11 citations84

MASX ENERGY SERVICES GROUP INC

5 patents
US5022472AJun 11, 1991

Hydraulic clamp for rotary drilling head

MASX ENERGY SERVICES GROUP INC202 citations99
US5154231AOct 13, 1992

Whipstock assembly with hydraulically set anchor

MASX ENERGY SERVICES GROUP INC146 citations97
US5062450ANov 5, 1991

Valve body for oilfield applications

MASX ENERGY SERVICES GROUP INC75 citations96
US5048621ASep 17, 1991

Adjustable bent housing for controlled directional drilling

MASX ENERGY SERVICES GROUP INC77 citations96
US5082020AJan 21, 1992

Valve body for oilfield applications

MASX ENERGY SERVICES GROUP INC52 citations93

DEWEY CHARLES H

3 patents
US8186458B2May 29, 2012

Expandable window milling bit and methods of milling a window in casing

DEWEY CHARLES H9 citations83
US8967300B2Mar 3, 2015

Pressure activated flow switch for a downhole tool

DEWEY CHARLES H7 citations78
US8881845B2Nov 11, 2014

Expandable window milling bit and methods of milling a window in casing

DEWEY CHARLES H4 citations72

DRILEX SYST INC

2 patents
US4765404AAug 23, 1988

Whipstock packer assembly

DRILEX SYST INC238 citations99
US4759413AJul 26, 1988

Method and apparatus for setting an underwater drilling system

DRILEX SYST INC95 citations96

A Z INT TOOL CO

2 patents
US4646826AMar 3, 1987

Well string cutting apparatus

A Z INT TOOL CO96 citations95
US4533003AAug 6, 1985

Drilling apparatus and cutter therefor

A Z INT TOOL CO54 citations95

JOALTO DESIGN INC

2 patents
US6279954B1Aug 28, 2001

Restraint belt presenter having offset rotary action

JOALTO DESIGN INC21 citations89
US6308986B1Oct 30, 2001

Restraint belt presenter

JOALTO DESIGN INC45 citations88

MASX ENTERGY SERVICES GROUP IN

1 patent
US5213158AMay 25, 1993

Dual rotating stripper rubber drilling head

MASX ENTERGY SERVICES GROUP IN81 citations94

MASX ENERGY SERVICE GROUP INC

1 patent
US5035292AJul 30, 1991

Whipstock starter mill with pressure drop tattletale

MASX ENERGY SERVICE GROUP INC94 citations92

UNITED BRANDS

1 patent
US4240077ADec 16, 1980

Thermostat

UNITED BRANDS38 citations89

SWADI SHANTANU N

1 patent
US9228406B2Jan 5, 2016

Extended whipstock and mill assembly

SWADI SHANTANU N7 citations81

UNITED BRANDS CO

1 patent
US4399428AAug 16, 1983

Thermostat

UNITED BRANDS CO27 citations81

ERVIN DAVID L

1 patent
US8820437B2Sep 2, 2014

Cementing whipstock apparatus and methods

ERVIN DAVID L12 citations80

POLAROID CORP

1 patent
US4303751ADec 1, 1981

Rupturable photographic processing alkaline fluid container

POLAROID CORP9 citations72

Showing the top 50 of 62 patents by PatentIndex Score.