Inventor · disambiguated record
Joseph A. Zierolf
Also filed as: ZIEROLF JOSEPH A
10 granted patents·4 pending applications·775 citations·filing 1999–2011
93Inventor score
Technology areasE21B
Top patents by PatentIndex Score
14 records- 0196US6759968B2Method and apparatus for determining position in a pipeMARATHON OIL CO·Filed 2001·Granted Jul 6, 2004·219 cites·41 claims
- 0296US6333699B1Method and apparatus for determining position in a pipeMARATHON OIL CO·Filed 1999·Granted Dec 25, 2001·242 cites·45 claims
- 0395US7714741B2Method and system for performing operations and for improving production in wellsMARATHON OIL CO·Filed 2008·Granted May 11, 2010·51 cites·22 claims
- 0494US8044820B2Method and system for performing operations and for improving production in wellsMARATHON OIL CO·Filed 2010·Granted Oct 25, 2011·16 cites·20 claims
- 0594US7014100B2Process and assembly for identifying and tracking assetsMARATHON OIL CO·Filed 2001·Granted Mar 21, 2006·115 cites·48 claims
- 0692US8091775B2Process and assembly for identifying and tracking assetsZIEROLF JOSEPH A·Filed 2010·Granted Jan 10, 2012·18 cites·17 claims
- 0789US7677439B2Process and assembly for identifying and tracking assetsMARATHON OIL CO·Filed 2006·Granted Mar 16, 2010·28 cites·10 claims
- 0881US7400263B2Method and system for performing operations and for improving production in wellsMARATHON OIL CO·Filed 2002·Granted Jul 15, 2008·40 cites·59 claims
- 0979US7283061B1Method and system for performing operations and for improving production in wellsMARATHON OIL CO·Filed 2000·Granted Oct 16, 2007·42 cites·36 claims
- 1076US9140818B2Method and apparatus for determining position in a pipeZIEROLF JOSEPH A·Filed 2011·Granted Sep 22, 2015·4 cites·19 claims
- 1145US2010013664A1Method and apparatus for determining position in a pipeMARATHON OIL CO·Filed 2009·Application pending·0 cites
- 1237US2004239521A1Method and apparatus for determining position in a pipeFiled 2004·Application pending·0 cites
- 1336US2011272165A1Locating sub system and method of orienting and/or positioningZIEROLF JOSEPH A·Filed 2010·Application pending·0 cites
- 1436US2011198099A1Anchor apparatus and methodZIEROLF JOSEPH A·Filed 2010·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →