Inventor · disambiguated record
Ryouhei Kirisawa
Also filed as: KIRISAWA RYOUHEI
74 granted patents·2 pending applications·3,505 citations·filing 1988–2025
99Inventor score
Top patents by PatentIndex Score
76 records- 0199US11792992B2Nonvolatile semiconductor memory device and method for manufacturing sameKIOXIA CORP·Filed 2022·Granted Oct 17, 2023·4 cites·10 claims
- 0299US8374033B2Nonvolatile semiconductor memory deviceTOSHIBA KK·Filed 2010·Granted Feb 12, 2013·200 cites·9 claims
- 0399US4959812AElectrically erasable programmable read-only memory with NAND cell structureTOSHIBA KK·Filed 1988·Granted Sep 25, 1990·652 cites·15 claims
- 0498US8436414B2Non-volatile semiconductor stacked memory device having two semiconductor pillars in a through hole and method for manufacturing sameTANAKA HIROYASU·Filed 2010·Granted May 7, 2013·56 cites·18 claims
- 0598US8178919B2Nonvolatile semiconductor memory device and method for manufacturing sameFUJIWARA TOMOKO·Filed 2010·Granted May 15, 2012·216 cites·15 claims
- 0698US8169826B2Nonvolatile semiconductor memory deviceHISHIDA TOMOO·Filed 2010·Granted May 1, 2012·68 cites·20 claims
- 0798US5602789AElectrically erasable and programmable non-volatile and multi-level memory systemn with write-verify controllerTOSHIBA KK·Filed 1995·Granted Feb 11, 1997·284 cites·25 claims
- 0898US5386422AElectrically erasable and programmable non-volatile memory system with write-verify controller using two reference levelsTOSHIBA KK·Filed 1994·Granted Jan 31, 1995·293 cites·2 claims
- 0997US8653582B2Nonvolatile semiconductor memory device and method for manufacturing sameFUKUZUMI YOSHIAKI·Filed 2010·Granted Feb 18, 2014·26 cites·15 claims
- 1097US8507972B2Nonvolatile semiconductor memory deviceOOTA SHIGETO·Filed 2010·Granted Aug 13, 2013·163 cites·20 claims
- 1197US8188530B2Nonvolatile semiconductor memory device and method for manufacturing sameTANAKA HIROYASU·Filed 2010·Granted May 29, 2012·31 cites·15 claims
- 1297US4939690AElectrically erasable programmable read-only memory with NAND cell structure that suppresses memory cell threshold voltage variationTOSHIBA KK·Filed 1988·Granted Jul 3, 1990·142 cites·15 claims
- 1396US9941296B2Nonvolatile semiconductor memory device and method for manufacturing sameTOSHIBA MEMORY CORP·Filed 2017·Granted Apr 10, 2018·7 cites·7 claims
- 1496US9601503B2Nonvolatile semiconductor memory device and method for manufacturing sameTOSHIBA KK·Filed 2016·Granted Mar 21, 2017·7 cites·16 claims
- 1596US9312134B2Nonvolatile semiconductor memory device and method for manufacturing sameTOSHIBA KK·Filed 2014·Granted Apr 12, 2016·12 cites·20 claims
- 1696US8199573B2Nonvolatile semiconductor memory deviceFUKUZUMI YOSHIAKI·Filed 2010·Granted Jun 12, 2012·35 cites·20 claims
- 1795US8194467B2Nonvolatile semiconductor memory deviceMIKAJIRI YOSHIMASA·Filed 2010·Granted Jun 5, 2012·40 cites·20 claims
- 1895US5293337AElectrically erasable programmable read-only memory with electric field decreasing controllerTOSHIBA KK·Filed 1991·Granted Mar 8, 1994·100 cites·13 claims
- 1994US8766351B2Semiconductor storage device and manufacturing method of semiconductor storage deviceIMAMURA TAKESHI·Filed 2011·Granted Jul 1, 2014·21 cites·12 claims
- 2094US8748971B2Three dimensional nonvolatile semiconductor memory having pillars provided inside an oblate through holeTOSHIBA KK·Filed 2013·Granted Jun 10, 2014·15 cites·17 claims
- 2194US5469444AElectrically erasable and programmable non-volatile memory system with write-verify controller using two reference levelsTOSHIBA KK·Filed 1994·Granted Nov 21, 1995·174 cites·20 claims
- 2294US5321699AElectrically erasable and programmable non-volatile memory system with write-verify controller using two reference levelsTOSHIBA KK·Filed 1992·Granted Jun 14, 1994·171 cites·20 claims
- 2393US11257842B2Nonvolatile semiconductor memory device and method for manufacturing sameKIOXIA CORP·Filed 2020·Granted Feb 22, 2022·2 cites·15 claims
- 2493US10418378B2Nonvolatile semiconductor memory device and method for manufacturing sameTOSHIBA MEMORY CORP·Filed 2018·Granted Sep 17, 2019·4 cites·10 claims
- 2593US8264031B2Nonvolatile semiconductor memory device and method for manufacturing sameKIDOH MASARU·Filed 2010·Granted Sep 11, 2012·21 cites·16 claims
- 2693US8189371B2Nonvolatile semiconductor memory device and method for driving sameKATSUMATA RYOTA·Filed 2010·Granted May 29, 2012·18 cites·18 claims
- 2792US9318503B2Nonvolatile semiconductor memory device and method for manufacturing sameTOSHIBA KK·Filed 2015·Granted Apr 19, 2016·4 cites·18 claims
- 2892US8654586B2Nonvolatile semiconductor memory deviceTOSHIBA KK·Filed 2013·Granted Feb 18, 2014·13 cites·11 claims
- 2991US8320182B2Nonvolatile semiconductor memory deviceKIRISAWA RYOUHEI·Filed 2010·Granted Nov 27, 2012·14 cites·21 claims
- 3090US8218358B2Nonvolatile semiconductor memory device and method for driving sameKATSUMATA RYOTA·Filed 2010·Granted Jul 10, 2012·8 cites·14 claims
- 3190USRE35838EElectrically erasable programmable read-only memory with NAND cell structureTOSHIBA KK·Filed 1995·Granted Jul 7, 1998·90 cites·16 claims
- 3290US2025294761A1Nonvolatile semiconductor memory device and method for manufacturing sameKIOXIA CORP·Filed 2025·Application pending·0 cites
- 3389US12356622B2Nonvolatile semiconductor memory device and method for manufacturing sameKIOXIA CORP·Filed 2023·Granted Jul 8, 2025·0 cites·16 claims
- 3489US8440528B2Method for manufacturing a vertical nonvolatile semiconductor memory device including forming floating gates within the recesses created on the interlayer insulating filmsKITO MASARU·Filed 2009·Granted May 14, 2013·13 cites·5 claims
- 3589US5768195ASemiconductor memory deviceTOSHIBA KK·Filed 1997·Granted Jun 16, 1998·64 cites·32 claims
- 3688US5050125AElectrically erasable programmable read-only memory with NAND cellstructureTOSHIBA KK·Filed 1988·Granted Sep 17, 1991·60 cites·6 claims
- 3787US8436415B2Nonvolatile semiconductor memory device and method of manufacturing the sameKIDOH MASARU·Filed 2010·Granted May 7, 2013·10 cites·16 claims
- 3887US5528547AElectrically erasable programmable read-only memory with electric field decreasing controllerTOSHIBA KK·Filed 1994·Granted Jun 18, 1996·52 cites·17 claims
- 3986US6555870B1Nonvolatile semiconductor memory device and method for producing sameTOSHIBA KK·Filed 2000·Granted Apr 29, 2003·40 cites·6 claims
- 4084US5508957ANon-volatile semiconductor memory with NAND cell structure and switching transistors with different channel lengths to reduce punch-throughTOSHIBA KK·Filed 1994·Granted Apr 16, 1996·56 cites·6 claims
- 4183US8361862B2Method for manufacturing nonvolatile semiconductor memory device and nonvolatile semiconductor memory deviceTOSHIBA KK·Filed 2010·Granted Jan 29, 2013·7 cites·18 claims
- 4282USRE50330ENonvolatile semiconductor memory device and method for driving sameKIOXIA CORP·Filed 2022·Granted Mar 4, 2025·0 cites·23 claims
- 4380US9029934B2Nonvolatile semiconductor memory device including floating gate electrodes formed between control gate electrodes and vertically formed along a semiconductor pillarTOSHIBA KK·Filed 2013·Granted May 12, 2015·4 cites·12 claims
- 4480US8294191B2Multi-layer memory device including vertical and U-shape charge storage regionsKATSUMATA RYOTA·Filed 2010·Granted Oct 23, 2012·6 cites·16 claims
- 4580US5392238ANonvolatile semiconductor memory deviceTOSHIBA KK·Filed 1994·Granted Feb 21, 1995·43 cites·7 claims
- 4675US8963230B2Semiconductor storage device and manufacturing method of semiconductor storage deviceTOSHIBA KK·Filed 2014·Granted Feb 24, 2015·3 cites·18 claims
- 4775US5402373AElectrically erasable programmable read-only memory with electric field decreasing controllerTOSHIBA KK·Filed 1994·Granted Mar 28, 1995·29 cites·15 claims
- 4874USRE49152ENonvolatile semiconductor memory device and method for driving sameKIOXIA CORP·Filed 2020·Granted Jul 26, 2022·0 cites·22 claims
- 4974US8351277B2Method for operating semiconductor memory deviceTOSHIBA KK·Filed 2011·Granted Jan 8, 2013·5 cites·18 claims
- 5074US5978265ANon-volatile semiconductor memory device with nand type memory cell arraysTOSHIBA KK·Filed 1991·Granted Nov 2, 1999·35 cites·34 claims
Showing the top 50 of 76 patent records by PatentIndex Score.
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