Inventor · disambiguated record
Douglas W. Spencer
Also filed as: SPENCER DOUGLAS W
8 granted patents·7 pending applications·122 citations·filing 2005–2019
87Inventor score
Files withMICROLINE TECH CORPORATION5BAKER HUGHES INC4QUANTA ASSOCIATES LP3GIRRELL BRUCE I1IONEARTH LLC1
Top patents by PatentIndex Score
15 records- 0189US7403000B2Apparatus and method of determining casing thickness and permeabilityBAKER HUGHES INC·Filed 2005·Granted Jul 22, 2008·34 cites·19 claims
- 0286US8797033B1Stress detection tool using magnetic barkhausen noiseGIRRELL BRUCE I·Filed 2011·Granted Aug 5, 2014·20 cites·22 claims
- 0384US8261623B2Communication system for pipeline inspectionMILLER JERRY E·Filed 2008·Granted Sep 11, 2012·23 cites·44 claims
- 0482US7795864B2Apparatus and method of using multi-component measurements for casing evaluationBAKER HUGHES INC·Filed 2005·Granted Sep 14, 2010·19 cites·30 claims
- 0578US7370703B2Downhole hydraulic pipe cutterBAKER HUGHES INC·Filed 2005·Granted May 13, 2008·9 cites·29 claims
- 0677US10364665B2Method and apparatus for stress mapping of pipelines and other tubularsMICROLINE TECH CORPORATION·Filed 2017·Granted Jul 30, 2019·4 cites·22 claims
- 0775US7595636B2Apparatus and method of using accelerometer measurements for casing evaluationBAKER HUGHES INC·Filed 2005·Granted Sep 29, 2009·13 cites·28 claims
- 0850US2008278314A1Event tracking and monitoring systemIONEARTH LLC·Filed 2008·Application pending·0 cites
- 0942US2019353621A1Fluid emitter system for tubular inspectionQUANTA ASSOCIATES LP·Filed 2018·Application pending·0 cites
- 1038US10444194B2Method and apparatus for material identification of pipelines and other tubularsMICROLINE TECH CORPORATION·Filed 2017·Granted Oct 15, 2019·0 cites·14 claims
- 1137US2019212131A1Pipeline depth of cover determination method and apparatusQUANTA ASSOCIATES LP·Filed 2019·Application pending·0 cites
- 1236US2019086370A1Statistical analysis of chaotic response signals for tubularsQUANTA ASSOCIATES LP·Filed 2018·Application pending·0 cites
- 1334US2018149622A1Method and apparatus for vibroacoustic modulation crack detection and characterization of conduits and other structuresMICROLINE TECH CORPORATION·Filed 2017·Application pending·0 cites
- 1434US2018231507A1Method and apparatus for metamaterial enhanced chaotic cavity transducerMICROLINE TECH CORPORATION·Filed 2018·Application pending·0 cites
- 1530US2018179885A1Magneto-mechanical impedance methods and apparatus for crack detection and characterization of conduits and other structuresMICROLINE TECH CORPORATION·Filed 2017·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →