Assignee
WATERWORKS TECHNOLOGY DEV ORG
JP·45 granted patents·1 pending application·536 citations·filing 1998–2021
Top patents by PatentIndex Score
46 records- 0190US6056329ATelescopic pivotal pipe jointWATERWORKS TECHNOLOGY DEV ORG·Filed 1998·Granted May 2, 2000·75 cites·14 claims
- 0289US7354073B2Pipe jointWATERWORKS TECHNOLOGY DEV ORG·Filed 2005·Granted Apr 8, 2008·23 cites·6 claims
- 0388USD453816SFlexible jointWATERWORKS TECHNOLOGY DEV ORG·Filed 2000·Granted Feb 19, 2002·36 cites·1 claims
- 0486US7328874B2Supporting device for non-averaged forceWATERWORKS TECHNOLOGY DEV ORG·Filed 2006·Granted Feb 12, 2008·20 cites·11 claims
- 0581US6131957AFixing construction for pipe jointWATERWORKS TECHNOLOGY DEV ORG·Filed 1999·Granted Oct 17, 2000·54 cites·13 claims
- 0678US6371530B1Tube jointWATERWORKS TECHNOLOGY DEV ORG·Filed 2000·Granted Apr 16, 2002·28 cites·6 claims
- 0777US10088085B2Extendable and contractible flexible jointWATERWORKS TECHNOLOGY DEV ORG·Filed 2015·Granted Oct 2, 2018·3 cites·5 claims
- 0873US11655901B2Gate valveWATERWORKS TECHNOLOGY DEV ORG·Filed 2020·Granted May 23, 2023·1 cites·19 claims
- 0973US6019396APipe connecting apparatusWATERWORKS TECHNOLOGY DEV ORG·Filed 1998·Granted Feb 1, 2000·44 cites·20 claims
- 1071US11248732B2Gate valveWATERWORKS TECHNOLOGY DEV ORG·Filed 2017·Granted Feb 15, 2022·2 cites·7 claims
- 1170US11287058B2Valve removal method of fluid pipeline structure, fluid pipeline structure, and valve deviceWATERWORKS TECHNOLOGY DEV ORG·Filed 2018·Granted Mar 29, 2022·2 cites·10 claims
- 1268US5924436AConnecting construction of branch pipe and connecting method thereofWATERWORKS TECHNOLOGY DEV ORG·Filed 1998·Granted Jul 20, 1999·34 cites·8 claims
- 1366US10612688B2Corrosion prevention apparatus and corrosion prevention method for cut faces of pipesWATERWORKS TECHNOLOGY DEV ORG·Filed 2016·Granted Apr 7, 2020·2 cites·6 claims
- 1466US7819384B2Gate valve deviceWATERWORKS TECHNOLOGY DEV ORG·Filed 2006·Granted Oct 26, 2010·7 cites·12 claims
- 1566US7717136B2Pipeline closing apparatusWATERWORKS TECHNOLOGY DEV ORG·Filed 2004·Granted May 18, 2010·13 cites·13 claims
- 1665US12031649B2Disengagement prevention structure for pipe connecting portionWATERWORKS TECHNOLOGY DEV ORG·Filed 2019·Granted Jul 9, 2024·1 cites·10 claims
- 1761US5967168AMethod of connecting branch pipeWATERWORKS TECHNOLOGY DEV ORG·Filed 1998·Granted Oct 19, 1999·21 cites·14 claims
- 1856US6659511B2Flexible fluid-transport pipe joint apparatusWATERWORKS TECHNOLOGY DEV ORG·Filed 2001·Granted Dec 9, 2003·18 cites·7 claims
- 1954US10151410B2Extending/contracting flexible pipe and method for assembling extending/contracting flexible pipeWATERWORKS TECHNOLOGY DEV ORG·Filed 2014·Granted Dec 11, 2018·0 cites·6 claims
- 2054US7073776B2Sluicing valve deviceWATERWORKS TECHNOLOGY DEV ORG·Filed 2004·Granted Jul 11, 2006·5 cites·14 claims
- 2154US6250690B1Expansion flexible tube joint and assembling method thereofWATERWORKS TECHNOLOGY DEV ORG·Filed 1999·Granted Jun 26, 2001·20 cites·7 claims
- 2253US6883550B2Flexible pipe jointWATERWORKS TECHNOLOGY DEV ORG·Filed 2003·Granted Apr 26, 2005·11 cites·9 claims
- 2353US6305426B1Expansion tube joint and assembling method thereofWATERWORKS TECHNOLOGY DEV ORG·Filed 1999·Granted Oct 23, 2001·18 cites·8 claims
- 2451US6773040B2Spacer-less type pipe joint and packing ring used for the sameWATERWORKS TECHNOLOGY DEV ORG·Filed 2002·Granted Aug 10, 2004·6 cites·20 claims
- 2551USD453552SFlexible jointWATERWORKS TECHNOLOGY DEV ORG·Filed 2000·Granted Feb 12, 2002·7 cites·1 claims
- 2651US6203073B1Tube jointWATERWORKS TECHNOLOGY DEV ORG·Filed 1999·Granted Mar 20, 2001·19 cites·8 claims
- 2750USD426457SFlexible jointWATERWORKS TECHNOLOGY DEV ORG·Filed 1999·Granted Jun 13, 2000·6 cites·1 claims
- 2850USD426144SFlexible jointWATERWORKS TECHNOLOGY DEV ORG·Filed 1999·Granted Jun 6, 2000·6 cites·1 claims
- 2950USD424918SFlexible jointWATERWORKS TECHNOLOGY DEV ORG·Filed 1999·Granted May 16, 2000·6 cites·1 claims
- 3047US11512801B2Pipe joint and method of assembling pipe jointWATERWORKS TECHNOLOGY DEV ORG·Filed 2018·Granted Nov 29, 2022·0 cites·9 claims
- 3147US10989313B2Valve deviceWATERWORKS TECHNOLOGY DEV ORG·Filed 2019·Granted Apr 27, 2021·0 cites·8 claims
- 3247US6893001B2Gate valve apparatusWATERWORKS TECHNOLOGY DEV ORG·Filed 2003·Granted May 17, 2005·5 cites·7 claims
- 3342US11892111B2Housing device and method for mounting housing deviceWATERWORKS TECHNOLOGY DEV ORG·Filed 2021·Granted Feb 6, 2024·0 cites·10 claims
- 3441US10161555B2Coated expandable-contractible flexible pipeWATERWORKS TECHNOLOGY DEV ORG·Filed 2015·Granted Dec 25, 2018·0 cites·13 claims
- 3540US12422081B2Branch pipe forming apparatus, lid doubling as valve element, branch pipe forming apparatus with lid doubling as valve element, and branch pipe formation methodWATERWORKS TECHNOLOGY DEV ORG·Filed 2021·Granted Sep 23, 2025·0 cites·5 claims
- 3640USD481108SBranch pipe jointWATERWORKS TECHNOLOGY DEV ORG·Filed 2002·Granted Oct 21, 2003·5 cites·1 claims
- 3740USD425782SFlexible jointWATERWORKS TECHNOLOGY DEV ORG·Filed 1999·Granted May 30, 2000·3 cites·1 claims
- 3839USD454623SFlexible jointWATERWORKS TECHNOLOGY DEV ORG·Filed 2000·Granted Mar 19, 2002·3 cites·1 claims
- 3938US2002189692A1Joint fluid transport pipeWATERWORKS TECHNOLOGY DEV ORG·Filed 2001·Application pending·0 cites
- 4037US6467813B1Reinforcement fittingWATERWORKS TECHNOLOGY DEV ORG·Filed 1998·Granted Oct 22, 2002·13 cites·8 claims
- 4137US6161878AExternal cover pipe for fluid transport pipeWATERWORKS TECHNOLOGY DEV ORG·Filed 1998·Granted Dec 19, 2000·10 cites·8 claims
- 4237USD426143SFlexible jointWATERWORKS TECHNOLOGY DEV ORG·Filed 1999·Granted Jun 6, 2000·2 cites·1 claims
- 4337USD425406SFlexible jointWATERWORKS TECHNOLOGY DEV ORG·Filed 1999·Granted May 23, 2000·2 cites·1 claims
- 4437USD424917SFlexible jointWATERWORKS TECHNOLOGY DEV ORG·Filed 1999·Granted May 16, 2000·2 cites·1 claims
- 4534US11421811B2Hermetically sealing device and hermetically sealing methodWATERWORKS TECHNOLOGY DEV ORG·Filed 2017·Granted Aug 23, 2022·0 cites·8 claims
- 4634USD489434SBranch pipe jointWATERWORKS TECHNOLOGY DEV ORG·Filed 2002·Granted May 4, 2004·3 cites·1 claims
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