Inventor · disambiguated record
Akira Umezawa
Also filed as: UMEZAWA AKIRA
53 granted patents·3 pending applications·997 citations·filing 1995–2020
99Inventor score
Top patents by PatentIndex Score
56 records- 0195US6320428B1Semiconductor integrated circuit deviceTOSHIBA KK·Filed 2000·Granted Nov 20, 2001·72 cites·10 claims
- 0295US6052313ASemiconductor integrated circuit deviceTOSHIBA KK·Filed 1998·Granted Apr 18, 2000·92 cites·27 claims
- 0394US7120053B2Semiconductor intergrated circuit device with a main cell array and a fuse cell array whose word lines and bit lines are extended in the same directionsTOSHIBA KK·Filed 2005·Granted Oct 10, 2006·24 cites·8 claims
- 0494US6195307B1Booster circuit and semiconductor memory device having the sameTOSHIBA KK·Filed 2000·Granted Feb 27, 2001·81 cites·17 claims
- 0592US7332766B2Semiconductor integrated circuit device with a stacked gate including a floating gate and a control gateTOSHIBA KK·Filed 2005·Granted Feb 19, 2008·28 cites·7 claims
- 0692US7233526B2Semiconductor memory device with MOS transistors each having floating gate and control gateTOSHIBA KK·Filed 2005·Granted Jun 19, 2007·29 cites·20 claims
- 0790US7212434B2Semiconductor memory device with MOS transistors, each including a floating gate and a control gate, and a memory card including the sameTOSHIBA KK·Filed 2005·Granted May 1, 2007·25 cites·17 claims
- 0889US7263003B2Two-transistor flash memory device using replica cell array to control the precharge/discharge and sense amplifier circuits of the primary cell arrayTOSHIBA KK·Filed 2005·Granted Aug 28, 2007·19 cites·16 claims
- 0987US6222774B1Data-erasable non-volatile semiconductor memory deviceTOSHIBA KK·Filed 1999·Granted Apr 24, 2001·65 cites·23 claims
- 1085US10811393B2Memory deviceTOSHIBA MEMORY CORP·Filed 2019·Granted Oct 20, 2020·3 cites·13 claims
- 1185US7423910B2Semiconductor device including MOS transistors having floating gate and control gateTOSHIBA KK·Filed 2006·Granted Sep 9, 2008·9 cites·30 claims
- 1284US7505355B2Semiconductor memory device with MOS transistors each having floating gate and control gateTOSHIBA KK·Filed 2007·Granted Mar 17, 2009·16 cites·20 claims
- 1383US7233513B2Semiconductor memory device with MOS transistors each having floating gate and control gateTOSHIBA KK·Filed 2005·Granted Jun 19, 2007·15 cites·19 claims
- 1483US6041012ASemiconductor integrated circuit device having a booster circuit and a storage deviceTOSHIBA KK·Filed 1998·Granted Mar 21, 2000·44 cites·51 claims
- 1582US7376023B2Semiconductor memory device with MOS transistors each having floating gate and control gate and method of controlling the sameTOSHIBA KK·Filed 2006·Granted May 20, 2008·13 cites·19 claims
- 1682US7280407B2Semiconductor memory device including floating gates and control gates, control method for the same, and memory card including the sameTOSHIBA KK·Filed 2005·Granted Oct 9, 2007·16 cites·17 claims
- 1781US5568419ANon-volatile semiconductor memory device and data erasing method thereforTOSHIBA KK·Filed 1995·Granted Oct 22, 1996·49 cites·24 claims
- 1880US6333662B1Latch type level shift circuitTOSHIBA KK·Filed 1999·Granted Dec 25, 2001·43 cites·28 claims
- 1979US6108246ASemiconductor memory deviceTOSHIBA KK·Filed 1999·Granted Aug 22, 2000·40 cites·18 claims
- 2078US8432744B2Semiconductor storage device with a well control circuitUMEZAWA AKIRA·Filed 2011·Granted Apr 30, 2013·8 cites·20 claims
- 2178US6700817B2Semiconductor integrated circuit device with operation/function setting information memoryTOSHIBA KK·Filed 2002·Granted Mar 2, 2004·16 cites·27 claims
- 2276US7505324B2Semiconductor memory device with a stacked gate including a floating gate and a control gateTOSHIBA KK·Filed 2006·Granted Mar 17, 2009·6 cites·7 claims
- 2375US7672164B2Semiconductor integrated circuit device with a stacked gate including a floating gate and a control gateTOSHIBA KK·Filed 2008·Granted Mar 2, 2010·8 cites·17 claims
- 2475US7245530B2Semiconductor memory device with MOS transistors, each including floating gate and control gate, and memory card including the sameTOSHIBA KK·Filed 2005·Granted Jul 17, 2007·10 cites·5 claims
- 2574US6816421B2Nonvolatile semiconductor memoryTOSHIBA KK·Filed 2002·Granted Nov 9, 2004·21 cites·23 claims
- 2673US6940762B2Semiconductor memory device including MOS transistor having a floating gate and a control gateTOSHIBA KK·Filed 2004·Granted Sep 6, 2005·20 cites·11 claims
- 2773US6671203B2Nonvolatile semiconductor memory having page mode with a plurality of banksTOSHIBA KK·Filed 2002·Granted Dec 30, 2003·17 cites·40 claims
- 2871US6961268B2Nonvolatile semiconductor memory device with MOS transistors each having a floating gate and a control gateTOSHIBA KK·Filed 2004·Granted Nov 1, 2005·18 cites·19 claims
- 2971US6943402B2Nonvolatile semiconductor memory device including MOS transistors each having a floating gate and control gateTOSHIBA KK·Filed 2003·Granted Sep 13, 2005·20 cites·23 claims
- 3071US6226224B1Semiconductor integrated circuit device and storage deviceTOSHIBA KK·Filed 2000·Granted May 1, 2001·16 cites·19 claims
- 3170US7577032B2Non-volatile semiconductor memory deviceTOSHIBA KK·Filed 2007·Granted Aug 18, 2009·7 cites·12 claims
- 3269US11270981B2Memory deviceKIOXIA CORP·Filed 2020·Granted Mar 8, 2022·0 cites·17 claims
- 3369US6856543B2Semiconductor integrated circuit device with erasable and programmable fuse memoryTOSHIBA KK·Filed 2003·Granted Feb 15, 2005·10 cites·12 claims
- 3469US6034567ASemiconductor integrated circuit device provided with a differential amplifierTOSHIBA KK·Filed 1998·Granted Mar 7, 2000·29 cites·28 claims
- 3567US7505327B2Method of controlling a semiconductor device by a comparison of times for discharge of bit lines connected to different memory cell arraysTOSHIBA KK·Filed 2007·Granted Mar 17, 2009·5 cites·6 claims
- 3665US6480426B2Semiconductor integrated circuit deviceTOSHIBA KK·Filed 2001·Granted Nov 12, 2002·8 cites·25 claims
- 3764US7480180B2Semiconductor memory device comprising plural source linesTOSHIBA KK·Filed 2006·Granted Jan 20, 2009·5 cites·20 claims
- 3863US7120057B2Semiconductor memory device with a stacked gate including a floating gate and a control gateTOSHIBA KK·Filed 2004·Granted Oct 10, 2006·9 cites·12 claims
- 3962US7099191B2Channel erase type nonvolatile semiconductor memory device and electronic card and electronic apparatus using the deviceTOSHIBA KK·Filed 2005·Granted Aug 29, 2006·4 cites·10 claims
- 4062US6256227B1Non-volatile semiconductor memory having column sub-selector layout pattern adaptable to miniaturization of memory cellTOSHIBA KK·Filed 1999·Granted Jul 3, 2001·21 cites·10 claims
- 4160US7180789B2Semiconductor memory device with MOS transistors, each having a floating gate and a control gate, and memory card including the sameTOSHIBA KK·Filed 2005·Granted Feb 20, 2007·4 cites·21 claims
- 4257US6041011ABooster circuit and semiconductor memory device having the sameTOSHIBA KK·Filed 1998·Granted Mar 21, 2000·14 cites·37 claims
- 4356US8094496B2Nonvolatile semiconductor memory device and control method thereofUMEZAWA AKIRA·Filed 2009·Granted Jan 10, 2012·1 cites·23 claims
- 4454US7312503B2Semiconductor memory device including MOS transistors each having a floating gate and a control gateTOSHIBA KK·Filed 2004·Granted Dec 25, 2007·5 cites·36 claims
- 4553US7466610B2Non-volatile semiconductor memory deviceTOSHIBA KK·Filed 2007·Granted Dec 16, 2008·3 cites·12 claims
- 4653US7447063B2Nonvolatile semiconductor memory deviceTOSHIBA KK·Filed 2006·Granted Nov 4, 2008·2 cites·20 claims
- 4752US6940754B2Channel erase type nonvolatile semiconductor memory device and electronic card and electronic apparatus using the deviceTOSHIBA KK·Filed 2003·Granted Sep 6, 2005·6 cites·16 claims
- 4851US8331156B2Nonvolatile semiconductor storage device with multiple well regions and a shared bit lineKASAI TAKAMICHI·Filed 2010·Granted Dec 11, 2012·2 cites·14 claims
- 4946US8169253B2Power circuit including step-up circuit and stabilizing method thereofUMEZAWA AKIRA·Filed 2009·Granted May 1, 2012·2 cites·20 claims
- 5044US8259493B2Nonvolatile semiconductor storage device and method of testing the sameOHTA HITOSHI·Filed 2009·Granted Sep 4, 2012·1 cites·16 claims
Showing the top 50 of 56 patent records by PatentIndex Score.
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