Inventor · disambiguated record
Mark D. Randa
Also filed as: RANDA MARK · RANDA MARK D
37 granted patents·14 pending applications·342 citations·filing 1995–2024
97Inventor score
Files withEARTH TOOL CO LLC29CHARLES MACHINE WORKS15RANDA MARK D4EARTH TOOL CORP1EARTHJTOOL COMPANY L L C1
Top patents by PatentIndex Score
51 records- 0193US7086808B2Method and apparatus for on-grade boringEARTH TOOL CO LLC·Filed 2002·Granted Aug 8, 2006·52 cites·15 claims
- 0293US6761507B2Method and apparatus for replacement of underground pipeEARTH TOOL CO LLC·Filed 2001·Granted Jul 13, 2004·48 cites·31 claims
- 0387US10969053B2Lead pipe spudding prior to extraction or remediationEARTH TOOL CO LLC·Filed 2018·Granted Apr 6, 2021·3 cites·14 claims
- 0486US10584807B2Extraction of ductile pipeEARTH TOOL CO LLC·Filed 2018·Granted Mar 10, 2020·3 cites·40 claims
- 0586US8955586B1Beacon assemblyRANDA MARK D·Filed 2012·Granted Feb 17, 2015·10 cites·16 claims
- 0681US11619336B2Pipe slitting machine with rope storage reelCHARLES MACHINE WORKS·Filed 2020·Granted Apr 4, 2023·1 cites·22 claims
- 0780US9512951B2Pipe slitting apparatusEARTH TOOL CO LLC·Filed 2015·Granted Dec 6, 2016·3 cites·17 claims
- 0879US12410879B2Latch assembly for use with an inversion drumCHARLES MACHINE WORKS·Filed 2024·Granted Sep 9, 2025·0 cites·23 claims
- 0977US12496645B1Pipe slitterCHARLES MACHINE WORKS·Filed 2023·Granted Dec 16, 2025·0 cites·20 claims
- 1077US9566653B2Pipe slitterEARTH TOOL CO LLC·Filed 2014·Granted Feb 14, 2017·4 cites·21 claims
- 1177US6860514B2Drill string jointEARTHJTOOL COMPANY L L C·Filed 2003·Granted Mar 1, 2005·56 cites·6 claims
- 1275US7255516B2Method and apparatus for replacement of underground pipeEARTH TOOL CO LLC·Filed 2005·Granted Aug 14, 2007·13 cites·10 claims
- 1373US10161201B2Powered slip actuationEARTH TOOL CO LLC·Filed 2017·Granted Dec 25, 2018·1 cites·18 claims
- 1471USD816456SGut hook bladed pipe slitterEARTH TOOL CO LLC·Filed 2017·Granted May 1, 2018·1 cites·1 claims
- 1571US8875811B1Joint with check valve for a boring apparatusRANDA MARK D·Filed 2012·Granted Nov 4, 2014·4 cites·16 claims
- 1670US6953095B2Method and system for operating a reversible pneumatic ground piercing toolEARTH TOOL CO LLC·Filed 2005·Granted Oct 11, 2005·12 cites·5 claims
- 1768US2022325825A1System and method for extracting a buried pipeCHARLES MACHINE WORKS·Filed 2022·Application pending·0 cites
- 1867US12092257B2Lead pipe spudding prior to extraction or remediationCHARLES MACHINE WORKS·Filed 2021·Granted Sep 17, 2024·0 cites·15 claims
- 1966US10883628B2Extraction of ductile pipeCHARLES MACHINE WORKS·Filed 2020·Granted Jan 5, 2021·0 cites·18 claims
- 2066US2021364102A1Pipe Extraction Assisted By Pre-Stressed StrandCHARLES MACHINE WORKS·Filed 2021·Application pending·0 cites
- 2165US11112033B2Pipe extraction assisted by pre-stressed strandCHARLES MACHINE WORKS·Filed 2020·Granted Sep 7, 2021·0 cites·18 claims
- 2265US10550989B2Latch assembly for use with an inversion drumEARTH TOOL CO LLC·Filed 2018·Granted Feb 4, 2020·1 cites·20 claims
- 2363US11913570B1System for applying torsional force to a buried pipe to facilitate extractionCHARLES MACHINE WORKS·Filed 2021·Granted Feb 27, 2024·0 cites·19 claims
- 2463US6533052B2Drill bit for impact-assisted directional boringEARTH TOOL CO LLC·Filed 2001·Granted Mar 18, 2003·27 cites·12 claims
- 2561US2025141196A1Jaw engagement assist systemCHARLES MACHINE WORKS·Filed 2024·Application pending·0 cites
- 2661US2020056725A1System And Method For Extracting A Buried PipeEARTH TOOL CO LLC·Filed 2019·Application pending·0 cites
- 2760US12281726B2Pipe extraction assisted by pre-stressed strandCHARLES MACHINE WORKS·Filed 2022·Granted Apr 22, 2025·0 cites·19 claims
- 2860US2023339077A1Jaw engagement assist systemCHARLES MACHINE WORKS·Filed 2023·Application pending·0 cites
- 2957US11674354B2Piercing tool aiming deviceCHARLES MACHINE WORKS·Filed 2021·Granted Jun 13, 2023·0 cites·16 claims
- 3057US6913091B2Method and apparatus for replacement of underground pipeEARTH TOOL CO LLC·Filed 2003·Granted Jul 5, 2005·16 cites·12 claims
- 3156US6273201B1Pneumatic ground piercing tool with movable chisel headEARTH TOOL CO LLC·Filed 2000·Granted Aug 14, 2001·18 cites·27 claims
- 3255US2020149673A1Latch Assembly For Use With An Inversion DrumCHARLES MACHINE WORKS·Filed 2020·Application pending·0 cites
- 3354US7028785B2Pneumatic impact piercing toolEARTH TOOL CO LLC·Filed 2005·Granted Apr 18, 2006·3 cites·17 claims
- 3453USD1018244SPipe slitterCHARLES MACHINE WORKS·Filed 2022·Granted Mar 19, 2024·1 cites·1 claims
- 3553US10415722B2Split ring ram adapter with cam adjustmentEARTH TOOL CO LLC·Filed 2018·Granted Sep 17, 2019·0 cites·17 claims
- 3653US6923270B1Pneumatic impact piercing toolEARTH TOOL CO LLC·Filed 2004·Granted Aug 2, 2005·13 cites·8 claims
- 3753US2016319979A1Gut Hook Bladed Pipe SlitterEARTH TOOL CO LLC·Filed 2016·Application pending·0 cites
- 3852US5603383AReversible pneumatic ground piercing toolEARTH TOOL CORP·Filed 1995·Granted Feb 18, 1997·33 cites·10 claims
- 3951US2016161023A1Powered Slip ActuationEARTH TOOL CO LLC·Filed 2016·Application pending·0 cites
- 4049US2014294512A1Powered Slip ActuationEARTH TOOL CO LLC·Filed 2014·Application pending·0 cites
- 4147US10927602B2Reversible pneumatic pipe ramming toolEARTH TOOL CO LLC·Filed 2018·Granted Feb 23, 2021·0 cites·20 claims
- 4247US8955613B2Pneumatic impact toolRANDA MARK D·Filed 2009·Granted Feb 17, 2015·1 cites·2 claims
- 4345US7066279B2Pneumatic ground piercing toolEARTH TOOL CO LLC·Filed 2004·Granted Jun 27, 2006·7 cites·18 claims
- 4445US2015014060A1Tricone Bit ConstructionEARTH TOOL CO LLC·Filed 2014·Application pending·0 cites
- 4544US7055621B2Method and apparatus for replacement of underground pipeEARTH TOOL CO LLC·Filed 2004·Granted Jun 6, 2006·5 cites·20 claims
- 4644US2006269361A1Apparatus for on-grade boringWENTWORTH STEVEN W·Filed 2006·Application pending·0 cites
- 4744US2014131110A1Make-Up/Break-Out Device For Drilling HammersEARTH TOOL CO LLC·Filed 2013·Application pending·0 cites
- 4842US2018155985A1Steerable Downhole Hammer BitEARTH TOOL CO LLC·Filed 2017·Application pending·0 cites
- 4940US8181714B2Pneumatic impact piercing toolRANDA MARK D·Filed 2009·Granted May 22, 2012·0 cites·3 claims
- 5039US2016340981A1Eccentric cones for rock cuttingEARTH TOOL CO LLC·Filed 2016·Application pending·0 cites
Showing the top 50 of 51 patent records by PatentIndex Score.
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