Inventor · disambiguated record
Detlef Hahn
Also filed as: HAHN DETLEF
24 granted patents·4 pending applications·1,012 citations·filing 1991–2020
97Inventor score
Files withBAKER HUGHES INC14DBT GMBH3WESTFALIA BECORIT IND TECH2AHLER MARCO1BAKER HUGHES OILFIELD OPERATIONS LLC1
Top patents by PatentIndex Score
28 records- 0197US6626253B2Oscillating shear valve for mud pulse telemetryBAKER HUGHES INC·Filed 2001·Granted Sep 30, 2003·103 cites·22 claims
- 0297US6419033B1Apparatus and method for simultaneous drilling and casing wellboresBAKER HUGHES INC·Filed 2000·Granted Jul 16, 2002·225 cites·12 claims
- 0397US6196336B1Method and apparatus for drilling boreholes in earth formations (drilling liner systems)BAKER HUGHES INC·Filed 1998·Granted Mar 6, 2001·270 cites·33 claims
- 0496US6898150B2Hydraulically balanced reciprocating pulser valve for mud pulse telemetryBAKER HUGHES INC·Filed 2002·Granted May 24, 2005·102 cites·13 claims
- 0595US7417920B2Reciprocating pulser for mud pulse telemetryBAKER HUGHES INC·Filed 2005·Granted Aug 26, 2008·60 cites·26 claims
- 0689US7280432B2Oscillating shear valve for mud pulse telemetryBAKER HUGHES INC·Filed 2005·Granted Oct 9, 2007·26 cites·52 claims
- 0787US7808859B2Oscillating shear valve for mud pulse telemetryBAKER HUGHES INC·Filed 2007·Granted Oct 5, 2010·22 cites·21 claims
- 0886US8011450B2Active bottomhole pressure control with liner drilling and completion systemsBAKER HUGHES INC·Filed 2006·Granted Sep 6, 2011·29 cites·19 claims
- 0984US9809389B2Force measuring unit and system for measuring chain forcesCATERPILLAR GLOBAL MINING EUROPE GMBH·Filed 2014·Granted Nov 7, 2017·14 cites·14 claims
- 1083US6975244B2Oscillating shear valve for mud pulse telemetry and associated methods of useBAKER HUGHES INC·Filed 2002·Granted Dec 13, 2005·46 cites·43 claims
- 1173US8174404B2Downlink pulser for mud pulse telemetryHAHN DETLEF·Filed 2007·Granted May 8, 2012·12 cites·21 claims
- 1270US7250873B2Downlink pulser for mud pulse telemetryBAKER HUGHES INC·Filed 2003·Granted Jul 31, 2007·30 cites·25 claims
- 1365US9156621B2Face conveyor for extraction plants and trough element for said face conveyorPADBERG HENDRIK·Filed 2011·Granted Oct 13, 2015·3 cites·24 claims
- 1463US5287955AConnections for inter-connecting the pans of scraper-chain conveyorsWESTFALIA BECORIT IND TECH·Filed 1992·Granted Feb 22, 1994·20 cites·17 claims
- 1563US5224582AChannel sections for scraper-chain conveyorsGEWERK EISENHUETTE WESTFALIA·Filed 1991·Granted Jul 6, 1993·20 cites·16 claims
- 1652US8998343B2Method for determining the position or location of plant components in mining extracting plants and extracting plantAHLER MARCO·Filed 2011·Granted Apr 7, 2015·1 cites·27 claims
- 1751US7779984B2Arrangement for extracting extraction products in underground extraction operations in cavingBUCYRUS DBT EUROPE GMBH·Filed 2006·Granted Aug 24, 2010·2 cites·21 claims
- 1848US5156258AScraper-chain conveyors for use in mineral miningWESTFALIA BECORIT IND TECH·Filed 1991·Granted Oct 20, 1992·11 cites·20 claims
- 1944US8215876B2Shield cap for a shield-type mining supportONSORI SIAMAK·Filed 2009·Granted Jul 10, 2012·0 cites·21 claims
- 2044US7350874B2Method and device for extracting extraction products in underground miningDBT GMBH·Filed 2004·Granted Apr 1, 2008·4 cites·54 claims
- 2144US6872025B2Toggle retainer for toggle connectionsDBT GMBH·Filed 2002·Granted Mar 29, 2005·2 cites·9 claims
- 2238US11499420B2Oscillating shear valve for mud pulse telemetry and operation thereofBAKER HUGHES OILFIELD OPERATIONS LLC·Filed 2020·Granted Nov 15, 2022·0 cites·24 claims
- 2337US2007241275A1Neutron source for well loggingBAKER HUGHES INC·Filed 2005·Application pending·0 cites
- 2436US2004069535A1Method for generating pressure fluctuations in a flowing fluidBAKER HUGHES INC·Filed 2003·Application pending·0 cites
- 2536US2003056991A1Apparatus and method for simultaneous drilling and casing wellboresBAKER HUGHES INC·Filed 2002·Application pending·0 cites
- 2634US2003026167A1System and methods for detecting pressure signals generated by a downhole actuatorBAKER HUGHES INC·Filed 2002·Application pending·0 cites
- 2733US6186597B1Pick system for mining ploughs, in particular coal ploughsDBT GMBH·Filed 1999·Granted Feb 13, 2001·10 cites·34 claims
- 2829US9109445B2Shield canopy for a shield-type supportDEHMEL DENNIS·Filed 2010·Granted Aug 18, 2015·0 cites·18 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →