Assignee
CHARLES MACHINE WORKS
US·332 granted patents·63 pending applications·6,145 citations·filing 1974–2025
Top patents by PatentIndex Score
395 records- 0199US10337168B2Trenching assemblyCHARLES MACHINE WORKS·Filed 2017·Granted Jul 2, 2019·19 cites·25 claims
- 0299US10114404B2Hydraulic control systemCHARLES MACHINE WORKS·Filed 2016·Granted Oct 30, 2018·24 cites·20 claims
- 0398US10119246B2Vehicle with non-symmetrical drive membersCHARLES MACHINE WORKS·Filed 2017·Granted Nov 6, 2018·16 cites·18 claims
- 0498US10099733B1Endless track and guide memberCHARLES MACHINE WORKS·Filed 2017·Granted Oct 16, 2018·18 cites·24 claims
- 0598US9586635B2Tracked vehicleCHARLES MACHINE WORKS·Filed 2015·Granted Mar 7, 2017·24 cites·41 claims
- 0697US10422107B2Trenching system with hydraulically adjustable hubCHARLES MACHINE WORKS·Filed 2017·Granted Sep 24, 2019·18 cites·18 claims
- 0797US10399017B2Drilling fluid reclaimerCHARLES MACHINE WORKS·Filed 2017·Granted Sep 3, 2019·9 cites·19 claims
- 0897US10151080B2Valve assembly for work attachmentCHARLES MACHINE WORKS·Filed 2016·Granted Dec 11, 2018·13 cites·20 claims
- 0997US10059389B2Tracked vehicleCHARLES MACHINE WORKS·Filed 2017·Granted Aug 28, 2018·14 cites·4 claims
- 1097US9206851B2Horizontal directional drill pipe drive connection with locking featureCHARLES MACHINE WORKS·Filed 2013·Granted Dec 8, 2015·34 cites·18 claims
- 1197US5850624AElectronic compassCHARLES MACHINE WORKS·Filed 1995·Granted Dec 15, 1998·235 cites·74 claims
- 1297US5361029ASystem for locating multiple concealed underground objectsCHARLES MACHINE WORKS·Filed 1992·Granted Nov 1, 1994·248 cites·16 claims
- 1396US10378179B2Trenching systemCHARLES MACHINE WORKS·Filed 2017·Granted Aug 13, 2019·14 cites·21 claims
- 1496US9695573B2Trenching system with hydraulically adjustable hubCHARLES MACHINE WORKS·Filed 2015·Granted Jul 4, 2017·18 cites·21 claims
- 1596US9662599B2Drilling fluid reclaimerCHARLES MACHINE WORKS·Filed 2014·Granted May 30, 2017·13 cites·30 claims
- 1696US8375605B2Trenching systemCHARLES MACHINE WORKS·Filed 2010·Granted Feb 19, 2013·33 cites·13 claims
- 1796US5231355ALocator transmitter having an automatically tuned antennaCHARLES MACHINE WORKS·Filed 1990·Granted Jul 27, 1993·158 cites·18 claims
- 1895US12078053B2Null point depth calibrationCHARLES MACHINE WORKS·Filed 2022·Granted Sep 3, 2024·2 cites·22 claims
- 1995US12007491B2GPS assisted walkover locating system and methodCHARLES MACHINE WORKS·Filed 2022·Granted Jun 11, 2024·4 cites·14 claims
- 2095US11173432B2Drilling fluid reclaimerCHARLES MACHINE WORKS·Filed 2020·Granted Nov 16, 2021·3 cites·19 claims
- 2195US10704227B2Trenching assemblyCHARLES MACHINE WORKS·Filed 2019·Granted Jul 7, 2020·8 cites·21 claims
- 2295US10435092B2Track tensionerCHARLES MACHINE WORKS·Filed 2017·Granted Oct 8, 2019·15 cites·14 claims
- 2395USD794690SSprocket with double mud reliefCHARLES MACHINE WORKS·Filed 2016·Granted Aug 15, 2017·7 cites·1 claims
- 2495US9334627B2Determination of remote control operator positionCHARLES MACHINE WORKS·Filed 2014·Granted May 10, 2016·20 cites·14 claims
- 2595US9329297B2Dipole locator using multiple measurement pointsCHARLES MACHINE WORKS·Filed 2015·Granted May 3, 2016·14 cites·24 claims
- 2695US8981780B2Dipole locator using multiple measurement pointsCHARLES MACHINE WORKS·Filed 2013·Granted Mar 17, 2015·16 cites·18 claims
- 2795US7890235B2Determination of remote control operator positionCHARLES MACHINE WORKS·Filed 2006·Granted Feb 15, 2011·87 cites·36 claims
- 2895US7786731B2Dipole locator using multiple measurement pointsCHARLES MACHINE WORKS·Filed 2006·Granted Aug 31, 2010·47 cites·15 claims
- 2994US11851956B2Dual rod assembly and collar installation methodCHARLES MACHINE WORKS·Filed 2022·Granted Dec 26, 2023·2 cites·23 claims
- 3094US11536094B2Dual rod assembly and collar installation methodCHARLES MACHINE WORKS·Filed 2020·Granted Dec 27, 2022·3 cites·17 claims
- 3194US10358880B2Pipe storage boxCHARLES MACHINE WORKS·Filed 2017·Granted Jul 23, 2019·13 cites·23 claims
- 3294US9821953B2Apparatus for sealing a vacuum tank doorCHARLES MACHINE WORKS·Filed 2015·Granted Nov 21, 2017·23 cites·19 claims
- 3394US9803433B2Dual member pipe joint for a dual member drill stringCHARLES MACHINE WORKS·Filed 2015·Granted Oct 31, 2017·9 cites·47 claims
- 3494US9752301B2Trenching systemCHARLES MACHINE WORKS·Filed 2014·Granted Sep 5, 2017·21 cites·25 claims
- 3594US8806784B2Trenching systemCHARLES MACHINE WORKS·Filed 2013·Granted Aug 19, 2014·25 cites·11 claims
- 3693US11686180B2Virtual brake systemCHARLES MACHINE WORKS·Filed 2021·Granted Jun 27, 2023·2 cites·20 claims
- 3793US9739034B2Vehicle with non-symmetrical drive membersCHARLES MACHINE WORKS·Filed 2014·Granted Aug 22, 2017·14 cites·24 claims
- 3893US5264795ASystem transmitting and receiving digital and analog information for use in locating concealed conductorsCHARLES MACHINE WORKS·Filed 1990·Granted Nov 23, 1993·194 cites·51 claims
- 3993US5212891ASoft excavatorCHARLES MACHINE WORKS·Filed 1991·Granted May 25, 1993·71 cites·17 claims
- 4093US5065098ASystem for locating concealed underground objects using digital filteringCHARLES MACHINE WORKS·Filed 1990·Granted Nov 12, 1991·141 cites·27 claims
- 4192US10344450B2Object detection system and methodCHARLES MACHINE WORKS·Filed 2016·Granted Jul 9, 2019·22 cites·18 claims
- 4292US10221602B2Vacuum systemCHARLES MACHINE WORKS·Filed 2017·Granted Mar 5, 2019·10 cites·20 claims
- 4392US7649474B1System for wireless communication along a drill stringCHARLES MACHINE WORKS·Filed 2006·Granted Jan 19, 2010·37 cites·10 claims
- 4492US7624816B2Configurable beacon and methodCHARLES MACHINE WORKS·Filed 2008·Granted Dec 1, 2009·45 cites·14 claims
- 4592US6411094B1System and method for determining orientation to an underground objectCHARLES MACHINE WORKS·Filed 1997·Granted Jun 25, 2002·127 cites·82 claims
- 4691US10538949B2Vacuum systemCHARLES MACHINE WORKS·Filed 2019·Granted Jan 21, 2020·5 cites·20 claims
- 4791US10161199B2Dual member pipe joint for a dual member drill stringCHARLES MACHINE WORKS·Filed 2017·Granted Dec 25, 2018·5 cites·18 claims
- 4891US10100579B2Exhaust assembly cooling systemCHARLES MACHINE WORKS·Filed 2016·Granted Oct 16, 2018·15 cites·18 claims
- 4991US7389831B2Dual-member auger boring systemCHARLES MACHINE WORKS·Filed 2005·Granted Jun 24, 2008·56 cites·2 claims
- 5091US6543551B1Pipe handling deviceCHARLES MACHINE WORKS·Filed 2000·Granted Apr 8, 2003·118 cites·93 claims
Showing the top 50 of 395 patent records by PatentIndex Score.
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