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Akira Umezawa
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Yokohama-shi, Kanagawa-ken, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Memory device
Patent number
11,270,981
Issue date
Mar 8, 2022
Kioxia Corporation
Mikihiko Ito
G11 - INFORMATION STORAGE
Information
Patent Grant
Memory device
Patent number
10,811,393
Issue date
Oct 20, 2020
TOSHIBA MEMORY CORPORATION
Mikihiko Ito
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Semiconductor storage device with a well control circuit
Patent number
8,432,744
Issue date
Apr 30, 2013
Kabushiki Kaisha Toshiba
Akira Umezawa
G11 - INFORMATION STORAGE
Information
Patent Grant
Nonvolatile semiconductor storage device with multiple well regions...
Patent number
8,331,156
Issue date
Dec 11, 2012
Kabushiki Kaisha Toshiba
Takamichi Kasai
G11 - INFORMATION STORAGE
Information
Patent Grant
Nonvolatile semiconductor storage device and method of testing the...
Patent number
8,259,493
Issue date
Sep 4, 2012
Kabushiki Kaisha Toshiba
Hitoshi Ohta
G11 - INFORMATION STORAGE
Information
Patent Grant
Power circuit including step-up circuit and stabilizing method thereof
Patent number
8,169,253
Issue date
May 1, 2012
Kabushiki Kaisha Toshiba
Akira Umezawa
G11 - INFORMATION STORAGE
Information
Patent Grant
Nonvolatile semiconductor memory device and control method thereof
Patent number
8,094,496
Issue date
Jan 10, 2012
Kabushiki Kaisha Toshiba
Akira Umezawa
G11 - INFORMATION STORAGE
Information
Patent Grant
Semiconductor integrated circuit device with a stacked gate includi...
Patent number
7,672,164
Issue date
Mar 2, 2010
Kabushiki Kaisha Toshiba
Takehiro Hasegawa
G11 - INFORMATION STORAGE
Information
Patent Grant
Non-volatile semiconductor memory device
Patent number
7,577,032
Issue date
Aug 18, 2009
Kabushiki Kaisha Toshiba
Akira Umezawa
G11 - INFORMATION STORAGE
Information
Patent Grant
Semiconductor memory device with MOS transistors each having floati...
Patent number
7,505,355
Issue date
Mar 17, 2009
Kabushiki Kaisha Toshiba
Kazushige Kanda
G11 - INFORMATION STORAGE
Information
Patent Grant
Method of controlling a semiconductor device by a comparison of tim...
Patent number
7,505,327
Issue date
Mar 17, 2009
Kabushiki Kaisha Toshiba
Toshiaki Edahiro
G11 - INFORMATION STORAGE
Information
Patent Grant
Semiconductor memory device with a stacked gate including a floatin...
Patent number
7,505,324
Issue date
Mar 17, 2009
Kabushiki Kaisha Toshiba
Akira Umezawa
G11 - INFORMATION STORAGE
Information
Patent Grant
Semiconductor memory device comprising plural source lines
Patent number
7,480,180
Issue date
Jan 20, 2009
Kabushiki Kaisha Toshiba
Akira Umezawa
G11 - INFORMATION STORAGE
Information
Patent Grant
Non-volatile semiconductor memory device
Patent number
7,466,610
Issue date
Dec 16, 2008
Kabushiki Kaisha Toshiba
Akira Umezawa
G11 - INFORMATION STORAGE
Information
Patent Grant
Nonvolatile semiconductor memory device
Patent number
7,447,063
Issue date
Nov 4, 2008
Kabushiki Kaisha Toshiba
Akira Umezawa
G11 - INFORMATION STORAGE
Information
Patent Grant
Semiconductor device including MOS transistors having floating gate...
Patent number
7,423,910
Issue date
Sep 9, 2008
Kabushiki Kaisha Toshiba
Akira Umezawa
G11 - INFORMATION STORAGE
Information
Patent Grant
Semiconductor memory device with MOS transistors each having floati...
Patent number
7,376,023
Issue date
May 20, 2008
Kabushiki Kaisha Toshiba
Akira Umezawa
G11 - INFORMATION STORAGE
Information
Patent Grant
Semiconductor integrated circuit device with a stacked gate includi...
Patent number
7,332,766
Issue date
Feb 19, 2008
Kabushiki Kaisha Toshiba
Takehiro Hasegawa
G11 - INFORMATION STORAGE
Information
Patent Grant
Semiconductor memory device including MOS transistors each having a...
Patent number
7,312,503
Issue date
Dec 25, 2007
Kabushiki Kaisha Toshiba
Akira Umezawa
G11 - INFORMATION STORAGE
Information
Patent Grant
Semiconductor memory device including floating gates and control ga...
Patent number
7,280,407
Issue date
Oct 9, 2007
Kabushiki Kaisha Toshiba
Akira Umezawa
G11 - INFORMATION STORAGE
Information
Patent Grant
Two-transistor flash memory device using replica cell array to cont...
Patent number
7,263,003
Issue date
Aug 28, 2007
Kabushiki Kaisha Toshiba
Toshiaki Edahiro
G11 - INFORMATION STORAGE
Information
Patent Grant
Semiconductor memory device with MOS transistors, each including fl...
Patent number
7,245,530
Issue date
Jul 17, 2007
Kabushiki Kaisha Toshiba
Masaki Ichikawa
G11 - INFORMATION STORAGE
Information
Patent Grant
Semiconductor memory device with MOS transistors each having floati...
Patent number
7,233,513
Issue date
Jun 19, 2007
Kabushiki Kaisha Toshiba
Masahiro Kamoshida
G11 - INFORMATION STORAGE
Information
Patent Grant
Semiconductor memory device with MOS transistors each having floati...
Patent number
7,233,526
Issue date
Jun 19, 2007
Kabushiki Kaisha Toshiba
Akira Umezawa
G11 - INFORMATION STORAGE
Information
Patent Grant
Semiconductor memory device with MOS transistors, each including a...
Patent number
7,212,434
Issue date
May 1, 2007
Kabushiki Kaisha Toshiba
Akira Umezawa
G11 - INFORMATION STORAGE
Information
Patent Grant
Semiconductor memory device with MOS transistors, each having a flo...
Patent number
7,180,789
Issue date
Feb 20, 2007
Kabushiki Kaisha Toshiba
Akira Umezawa
G11 - INFORMATION STORAGE
Information
Patent Grant
Semiconductor memory device with a stacked gate including a floatin...
Patent number
7,120,057
Issue date
Oct 10, 2006
Kabushiki Kaisha Toshiba
Akira Umezawa
G11 - INFORMATION STORAGE
Information
Patent Grant
Semiconductor intergrated circuit device with a main cell array and...
Patent number
7,120,053
Issue date
Oct 10, 2006
Kabushiki Kaisha Toshiba
Shigeru Atsumi
G11 - INFORMATION STORAGE
Information
Patent Grant
Channel erase type nonvolatile semiconductor memory device and elec...
Patent number
7,099,191
Issue date
Aug 29, 2006
Kabushiki Kaisha Toshiba
Akira Umezawa
G11 - INFORMATION STORAGE
Information
Patent Grant
Nonvolatile semiconductor memory device with MOS transistors each h...
Patent number
6,961,268
Issue date
Nov 1, 2005
Kabushiki Kaisha Toshiba
Akira Umezawa
G11 - INFORMATION STORAGE
Patents Applications
last 30 patents
Information
Patent Application
MEMORY DEVICE
Publication number
20210005580
Publication date
Jan 7, 2021
Toshiba Memory Corporation
Mikihiko ITO
G11 - INFORMATION STORAGE
Information
Patent Application
MEMORY DEVICE
Publication number
20190206845
Publication date
Jul 4, 2019
Toshiba Memory Corporation
Mikihiko ITO
G11 - INFORMATION STORAGE
Information
Patent Application
SEMICONDUCTOR STORAGE DEVICE
Publication number
20110249506
Publication date
Oct 13, 2011
Kabushiki Kaisha Toshiba
Akira Umezawa
G11 - INFORMATION STORAGE
Information
Patent Application
NONVOLATILE SEMICONDUCTOR STORAGE DEVICE
Publication number
20110205810
Publication date
Aug 25, 2011
Kabushiki Kaisha Toshiba
Takamichi KASAI
G11 - INFORMATION STORAGE
Information
Patent Application
POWER CIRCUIT INCLUDING STEP-UP CIRCUIT AND STABILIZING METHOD THEREOF
Publication number
20100109627
Publication date
May 6, 2010
Akira UMEZAWA
Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information
Patent Application
NONVOLATILE SEMICONDUCTOR MEMORY DEVICE AND CONTROL METHOD THEREOF
Publication number
20100008143
Publication date
Jan 14, 2010
Akira Umezawa
G11 - INFORMATION STORAGE
Information
Patent Application
NONVOLATILE SEMICONDUCTOR STORAGE DEVICE AND METHOD OF TESTING THE...
Publication number
20090279357
Publication date
Nov 12, 2009
Hitoshi OHTA
G11 - INFORMATION STORAGE
Information
Patent Application
Labeling enzyme
Publication number
20090042218
Publication date
Feb 12, 2009
Kazunori Ikebukuro
G01 - MEASURING TESTING
Information
Patent Application
SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE WITH A STACKED GATE INCLUDI...
Publication number
20080212373
Publication date
Sep 4, 2008
Takehiro Hasegawa
G11 - INFORMATION STORAGE
Information
Patent Application
SEMICONDUCTOR MEMORY DEVICE WITH MOS TRANSISTORS EACH HAVING FLOATI...
Publication number
20080181016
Publication date
Jul 31, 2008
Toshiaki Edahiro
G11 - INFORMATION STORAGE
Information
Patent Application
NON-VOLATILE SEMICONDUCTOR MEMORY DEVICE
Publication number
20080123424
Publication date
May 29, 2008
Kabushiki Kaisha Toshiba
Akira Umezawa
G11 - INFORMATION STORAGE
Information
Patent Application
NON-VOLATILE SEMICONDUCTOR MEMORY DEVICE
Publication number
20070230246
Publication date
Oct 4, 2007
Kabushiki Kaisha Toshiba
Akira Umezawa
G11 - INFORMATION STORAGE
Information
Patent Application
SEMICONDUCTOR MEMORY DEVICE WITH MOS TRANSISTORS EACH HAVING FLOATI...
Publication number
20070201299
Publication date
Aug 30, 2007
Kazushige Kanda
G11 - INFORMATION STORAGE
Information
Patent Application
SEMICONDUCTOR MEMORY DEVICE COMPRISING PLURAL SOURCE LINES
Publication number
20070127294
Publication date
Jun 7, 2007
Akira Umezawa
G11 - INFORMATION STORAGE
Information
Patent Application
Semiconductor memory device with MOS transistors each having floati...
Publication number
20070109876
Publication date
May 17, 2007
Akira Umezawa
G11 - INFORMATION STORAGE
Information
Patent Application
NONVOLATILE SEMICONDUCTOR MEMORY DEVICE
Publication number
20070058429
Publication date
Mar 15, 2007
KABUSHIKI KAISHA TOSHIBA
Akira Umezawa
G11 - INFORMATION STORAGE
Information
Patent Application
SEMICONDUCTOR MEMORY DEVICE WITH A STACKED GATE INCLUDING A FLOATIN...
Publication number
20070020852
Publication date
Jan 25, 2007
Akira Umezawa
G11 - INFORMATION STORAGE
Information
Patent Application
Semiconductor device including MOS transistors having floating gate...
Publication number
20060268653
Publication date
Nov 30, 2006
Akira Umezawa
G11 - INFORMATION STORAGE
Information
Patent Application
Semiconductor memory device with MOS transistors each having floati...
Publication number
20060083064
Publication date
Apr 20, 2006
Toshiaki Edahiro
G11 - INFORMATION STORAGE
Information
Patent Application
Semiconductor memory device with MOS transistors each having floati...
Publication number
20060083045
Publication date
Apr 20, 2006
Masahiro Kamoshida
G11 - INFORMATION STORAGE
Information
Patent Application
Semiconductor memory device with MOS transistors each having floati...
Publication number
20060083072
Publication date
Apr 20, 2006
Akira Umezawa
G11 - INFORMATION STORAGE
Information
Patent Application
Channel erase type nonvolatile semiconductor memory device and elec...
Publication number
20050254298
Publication date
Nov 17, 2005
Kabushiki Kaisha Toshiba
Akira Umezawa
G11 - INFORMATION STORAGE
Information
Patent Application
Non-volatile semiconductor memory device and method of fabricating...
Publication number
20050253183
Publication date
Nov 17, 2005
Kabushiki Kaisha Toshiba
Akira Umezawa
G11 - INFORMATION STORAGE
Information
Patent Application
Semiconductor memory device with MOS transistors, each including a...
Publication number
20050243602
Publication date
Nov 3, 2005
Akira Umezawa
G11 - INFORMATION STORAGE
Information
Patent Application
Semiconductor memory device including floating gates and control ga...
Publication number
20050237824
Publication date
Oct 27, 2005
Akira Umezawa
G11 - INFORMATION STORAGE
Information
Patent Application
Semiconductor memory device with MOS transistors, each including fl...
Publication number
20050237808
Publication date
Oct 27, 2005
Masaki Ichikawa
G11 - INFORMATION STORAGE
Information
Patent Application
Semiconductor memory device with MOS transistors, each having a flo...
Publication number
20050237817
Publication date
Oct 27, 2005
Akira Umezawa
G11 - INFORMATION STORAGE
Information
Patent Application
Semiconductor integrated circuit device with a stacked gate includi...
Publication number
20050218460
Publication date
Oct 6, 2005
Takehiro Hasegawa
G11 - INFORMATION STORAGE
Information
Patent Application
Semiconductor memory device with a stacked gate including a floatin...
Publication number
20050195636
Publication date
Sep 8, 2005
Akira Umezawa
G11 - INFORMATION STORAGE
Information
Patent Application
Semiconductor integrated circuit device with main cell array and fu...
Publication number
20050117406
Publication date
Jun 2, 2005
KABUSHIKI KAISHA TOSHIBA
Shigeru Atsumi
G11 - INFORMATION STORAGE