Inventor · disambiguated record
Hiroyuki Nagashima
Also filed as: NAGASHIMA HIROYUKI
111 granted patents·23 pending applications·1,350 citations·filing 1987–2025
99Inventor score
Top patents by PatentIndex Score
134 records- 0199US8929140B2Memory system in which a read level is changed based on standing time and at least one of a read, write or erase countNAGASHIMA HIROYUKI·Filed 2012·Granted Jan 6, 2015·41 cites·9 claims
- 0298US9767913B2Memory system performing read of nonvolatile semiconductor memory deviceTOSHIBA MEMORY CORP·Filed 2016·Granted Sep 19, 2017·30 cites·21 claims
- 0397US7272354B2Cleaning unit and image forming apparatus having multiple cleaning bladesRICOH KK·Filed 2006·Granted Sep 18, 2007·27 cites·46 claims
- 0496US8274068B2Semiconductor integrated circuit device and method of fabricating the sameNAGASHIMA HIROYUKI·Filed 2010·Granted Sep 25, 2012·24 cites·6 claims
- 0596US7272342B2Image forming apparatus having a detachable cartridge including a photoconductive drum with axis shaft having a minimal rotational eccentricity, and a method of assembling the image forming apparatusRICOH KK·Filed 2006·Granted Sep 18, 2007·26 cites·14 claims
- 0695US7266324B2Charging device, and process cartridge and image forming apparatus using the charging deviceRICOH KK·Filed 2006·Granted Sep 4, 2007·18 cites·15 claims
- 0795US7184684B2Image forming apparatus, process cartridge, and waste toner recovery deviceRICOH KK·Filed 2005·Granted Feb 27, 2007·16 cites·24 claims
- 0894US10373692B2Memory system performing read of nonvolatile semiconductor memory deviceTOSHIBA MEMORY CORP·Filed 2018·Granted Aug 6, 2019·6 cites·10 claims
- 0994US9524786B2Memory system changing a memory cell read voltage upon detecting a memory cell read errorTOSHIBA KK·Filed 2014·Granted Dec 20, 2016·13 cites·9 claims
- 1094US8755233B2Memory systemNAGASHIMA HIROYUKI·Filed 2011·Granted Jun 17, 2014·15 cites·20 claims
- 1194US8507889B2Nonvolatile semiconductor memory device comprising memory cell array having multilayer structureNAGASHIMA HIROYUKI·Filed 2010·Granted Aug 13, 2013·17 cites·14 claims
- 1294US8044456B2Nonvolatile semiconductor memory device and producing method thereofTOSHIBA KK·Filed 2009·Granted Oct 25, 2011·28 cites·17 claims
- 1394US7957203B2Nonvolatile semiconductor memory deviceTOSHIBA KK·Filed 2009·Granted Jun 7, 2011·25 cites·20 claims
- 1494US7460810B2Image forming apparatus having a cleaning roller for a charging roller of the apparatusRICOH KK·Filed 2005·Granted Dec 2, 2008·17 cites·38 claims
- 1594US7292817B2Image forming apparatus, process cartridge, and waste toner recovery deviceRICOH KK·Filed 2006·Granted Nov 6, 2007·15 cites·8 claims
- 1694US7242615B2Non-volatile semiconductor memory deviceTOSHIBA KK·Filed 2005·Granted Jul 10, 2007·36 cites·15 claims
- 1794US7024133B2Image forming apparatus using a user installable process cartridge, a method of arranging the process cartridge, and the process cartridge itselfRICOH KK·Filed 2003·Granted Apr 4, 2006·50 cites·51 claims
- 1894US6975830B2Image forming apparatus, process cartridge, and waste toner recovery deviceRICOH KK·Filed 2003·Granted Dec 13, 2005·37 cites·17 claims
- 1994US4780067AMulticylinder rotary compressorMITSUBISHI ELECTRIC CORP·Filed 1987·Granted Oct 25, 1988·65 cites·14 claims
- 2093US11475962B2Memory system performing read operation with read voltageKIOXIA CORP·Filed 2020·Granted Oct 18, 2022·2 cites·10 claims
- 2192US8391082B2Nonvolatile semiconductor memory deviceNAGASHIMA HIROYUKI·Filed 2011·Granted Mar 5, 2013·12 cites·18 claims
- 2292US8222677B2Semiconductor memory device and method of manufacturing the sameBABA YASUYUKI·Filed 2009·Granted Jul 17, 2012·29 cites·13 claims
- 2392US7493075B2Cleaning device, process cartridge and image forming apparatusRICOH KK·Filed 2007·Granted Feb 17, 2009·13 cites·15 claims
- 2492US7477862B2Charged device, cleaning device, process cartridge, toner, and image-forming device that uses theseRICOH KK·Filed 2005·Granted Jan 13, 2009·13 cites·15 claims
- 2592US7343132B2Image forming apparatus and process cartridge including sealable lubricating deviceRICOH KK·Filed 2005·Granted Mar 11, 2008·14 cites·20 claims
- 2692US7218877B2Charging device, and process cartridge and image forming apparatus including the charging device using the sameRICOH KK·Filed 2006·Granted May 15, 2007·12 cites·16 claims
- 2791US8964447B2Nonvolatile semiconductor memory deviceNAGASHIMA HIROYUKI·Filed 2009·Granted Feb 24, 2015·16 cites·15 claims
- 2891US8575590B2Nonvolatile semiconductor memory deviceMURAOKA KOICHI·Filed 2011·Granted Nov 5, 2013·24 cites·10 claims
- 2991US8441040B2Semiconductor memory deviceMINEMURA YOICHI·Filed 2010·Granted May 14, 2013·16 cites·20 claims
- 3091US7911854B2Semiconductor memory deviceTOSHIBA KK·Filed 2009·Granted Mar 22, 2011·17 cites·21 claims
- 3191US7305203B2Image forming apparatus including a process cartridge formed with a holeRICOH KK·Filed 2005·Granted Dec 4, 2007·13 cites·7 claims
- 3291US7136610B2Image forming apparatus using installable process cartridge, method of positioning process cartridge, and process cartridge itselfRICOH KK·Filed 2004·Granted Nov 14, 2006·38 cites·18 claims
- 3391US7062194B2Charging device, and process cartridge and image forming apparatus including the charging deviceRICOH KK·Filed 2004·Granted Jun 13, 2006·31 cites·17 claims
- 3490US8259489B2Nonvolatile semiconductor memory device generating different write pulses to vary resistancesNAGASHIMA HIROYUKI·Filed 2008·Granted Sep 4, 2012·14 cites·17 claims
- 3590US7688632B2Nonvolatile semiconductor memory capable of trimming an initial program voltage for each word lineTOSHIBA KK·Filed 2007·Granted Mar 30, 2010·21 cites·20 claims
- 3690US7043182B2Developer regulating member, developing device, electrophotographic image forming process cartridge, and image forming apparatus including the developer regulating memberRICOH KK·Filed 2003·Granted May 9, 2006·35 cites·33 claims
- 3789US8842481B2Nonvolatile semiconductor memory deviceTOSHIBA KK·Filed 2013·Granted Sep 23, 2014·8 cites·14 claims
- 3889US7110696B2Cleaning unit, process cartridge, and image forming apparatusRICOH KK·Filed 2003·Granted Sep 19, 2006·27 cites·47 claims
- 3988US10916312B2Memory system performing read of nonvolatile semiconductor memory deviceTOSHIBA MEMORY CORP·Filed 2019·Granted Feb 9, 2021·2 cites·18 claims
- 4088US9543011B2Nonvolatile semiconductor memory deviceTOSHIBA KK·Filed 2016·Granted Jan 10, 2017·5 cites·10 claims
- 4188US9299426B2Nonvolatile semiconductor memory deviceTOSHIBA KK·Filed 2015·Granted Mar 29, 2016·6 cites·15 claims
- 4288US7139504B2Charging device, and process cartridge and image forming apparatus using the charging deviceRICOH KK·Filed 2004·Granted Nov 21, 2006·24 cites·15 claims
- 4388US7110699B2Image forming apparatus and process cartridge for use in the sameRICOH KK·Filed 2005·Granted Sep 19, 2006·8 cites·7 claims
- 4487US7386257B2Imaging apparatus, and toner and process cartridge used in the imaging apparatusRICOH KK·Filed 2006·Granted Jun 10, 2008·7 cites·3 claims
- 4586US9324427B2Nonvolatile semiconductor memory deviceTOSHIBA KK·Filed 2014·Granted Apr 26, 2016·6 cites·14 claims
- 4686US8575589B2Nonvolatile semiconductor memory device and method of manufacturing the sameNAGASHIMA HIROYUKI·Filed 2008·Granted Nov 5, 2013·10 cites·8 claims
- 4786US7680429B2Charging device including charging roller and cleaning rollerRICOH KK·Filed 2008·Granted Mar 16, 2010·7 cites·19 claims
- 4886US7228099B2Cleaning device for cleaning a surface of an image support bodyRICOH KK·Filed 2004·Granted Jun 5, 2007·21 cites·28 claims
- 4985US8149609B2Nonvolatile semiconductor memory deviceNAGASHIMA HIROYUKI·Filed 2010·Granted Apr 3, 2012·8 cites·20 claims
- 5085US7433615B2Method of and image forming apparatus for controlling a light exposure conditionRICOH KK·Filed 2005·Granted Oct 7, 2008·9 cites·18 claims
Showing the top 50 of 134 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →